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Cytochrome P450

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substrates cause an opposite change in spectral properties, a "reverse type I" spectrum, by processes that are as yet unclear. Inhibitors and certain substrates that bind directly to the heme iron give rise to the type II difference spectrum, with a maximum at 430 nm and a minimum at 390 nm (see inset graph in figure). If no reducing equivalents are available, this complex may remain stable, allowing the degree of binding to be determined from absorbance measurements
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Depending on the substrate and enzyme involved, P450 enzymes can catalyze any of a wide variety of reactions. A hypothetical hydroxylation is illustrated. After the hydroxylated product has been released from the active site, the enzyme returns to its original state, with a water molecule returning
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C: If carbon monoxide (CO) binds to reduced P450, the catalytic cycle is interrupted. This reaction yields the classic CO difference spectrum with a maximum at 450 nm. However, the interruptive and inhibitory effects of CO varies upon different CYPs such that the CYP3A family is relatively less
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Binding of substrate is reflected in the spectral properties of the enzyme, with an increase in absorbance at 390 nm and a decrease at 420 nm. This can be measured by difference spectroscopies and is referred to as the "type I" difference spectrum (see inset graph in figure). Some
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An alternative route for mono-oxygenation is via the "peroxide shunt" (path "S" in figure). This pathway entails oxidation of the ferric-substrate complex with oxygen-atom donors such as peroxides and hypochlorites. A hypothetical peroxide "XOOH" is shown in the
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is used synonymously. These names should never be used as according to the nomenclature convention (as they denote a P450 in family number 450). However, some gene or enzyme names for P450s are also referred to by historical names (e.g.
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The most common reaction catalyzed by cytochromes P450 is a monooxygenase reaction, e.g., insertion of one atom of oxygen into the aliphatic position of an organic substrate (RH), while the other oxygen atom is
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Smith AT, Pazicni S, Marvin KA, Stevens DJ, Paulsen KM, Burstyn JN (April 2015). "Functional divergence of heme-thiolate proteins: a classification based on spectroscopic attributes".
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also rely on an Fe=O intermediate but lack hemes. Methane monooxygenase, which converts methane to methanol, are non-heme iron-and iron-copper-based enzymes.
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utilized by cytochrome P450 for conversion of hydrocarbons to alcohols via the action of "compound I", an iron(IV) oxide bound to a heme radical cation.
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The peroxo group formed in step 4 is rapidly protonated twice, releasing one molecule of water and forming the highly reactive species referred to as
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identity, while members of subfamilies must share at least 55% amino-acid identity. Nomenclature committees assign and track both base gene names (
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for CYP102A1) or functional names, denoting the catalytic activity and the name of the compound used as substrate. Examples include
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Sligar SG, Cinti DL, Gibson GG, Schenkman JB (October 1979). "Spin state control of the hepatic cytochrome P450 redox potential".
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Rittle J, Green MT (November 2010). "Cytochrome P450 Compound I: Capture, Characterization, and C-H Bond Activation Kinetics".
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Hopper CP, Zambrana PN, Goebel U, Wollborn J (June 2021). "A brief history of carbon monoxide and its therapeutic origins".
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Meunier B, de Visser SP, Shaik S (September 2004). "Mechanism of oxidation reactions catalyzed by cytochrome p450 enzymes".
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Molecular oxygen binds to the resulting ferrous heme center at the distal axial coordination position, initially giving a
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Danielson PB (December 2002). "The cytochrome P450 superfamily: biochemistry, evolution and drug metabolism in humans".
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Estabrook RW (December 2003). "A passion for P450s (Remembrances of the early history of research on cytochrome P450)".
766:(or just Compound I). This highly reactive intermediate was isolated in 2010, P450 Compound 1 is an iron(IV) oxo (or 3519: 2990: 734: 2225: 3329: 3127: 2968: 2847: 2546: 3313: 3120: 365:, a capital letter indicating the subfamily, and another numeral for the individual gene. The convention is to 219: 3675: 3024: 2994: 2954: 2942: 2240: 975: 3178: 3092: 3080: 688:
The active site of cytochrome P450 contains a heme-iron center. The iron is tethered to the protein via a
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Poulos TL, Finzel BC, Howard AJ (June 1987). "High-resolution crystal structure of cytochrome P450cam".
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Based on the nature of the electron transfer proteins, P450s can be classified into several groups:
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The current nomenclature guidelines suggest that members of new CYP families share at least 40%
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Nelson DR (January 2011). "Progress in tracing the evolutionary paths of cytochrome P450".
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The "Fe(V) intermediate" at the bottom left is a simplification: it is an Fe(IV) with a
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encoding P450 enzymes, and the enzymes themselves, are designated with the
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nomenclature is the official naming convention, although occasionally
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which do not require external reducing power. Notable ones include
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in which both electrons required by the CYP come from cytochrome b
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to occupy the distal coordination position of the iron nucleus.
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Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics
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and thiolate ligands. Evidence for the alternative perferryl
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Substrate binding induces electron transfer from NAD(P)H via
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groups) use CYP enzymes, but many other hydroxylases exist.
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signature consensus pattern - - x - - {F} - - {P} -
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Cytochrome P450: structure, mechanism, and biochemistry
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P450s are, in general, the terminal oxidase enzymes in
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Biochemical and Biophysical Research Communications
1240: 770:) species with an additional oxidizing equivalent 371:the name when referring to the gene. For example, 3790: 646: 1193: 1191: 1124: 740:A second electron is transferred, from either 270:that mostly, but not exclusively, function as 3513: 2241: 1528: 1074: 1363: 1361: 1188: 1392: 1313: 933: 3520: 3506: 2248: 2234: 1535: 1521: 1092:. Advances in Molecular and Cell Biology. 759:adduct to give a short-lived peroxo state. 661:Alpha-ketoglutarate-dependent hydroxylases 46: 2216:disorders of globin and globulin proteins 1418: 1358: 1309: 1307: 1150: 1125:Tucci FJ, Rosenzweig AC (February 2024). 1080: 1022: 1012: 939: 867: 851:Cytochrome P450 oxidoreductase deficiency 553:to transfer electrons from NADPH to P450. 52:Structure of lanosterol 14α-demethylase ( 1234: 789: 670: 508:in which electrons are transferred from 1269: 14: 3791: 1304: 1045: 994: 361:, followed by a number indicating the 303:. The term "P450" is derived from the 3501: 2229: 1516: 917: 915: 715:Substrate binds in proximity to the 375:is the gene that encodes the enzyme 280:. In mammals, these enzymes oxidize 32:Cytochrome P450 (individual enzymes) 807:Mechanistic details, including the 24: 861: 709: 25: 3830: 1393:Huang X, Groves JT (March 2018). 912: 490: 485:CYP Allele Nomenclature Committee 835: 516:(variously CPR, POR, or CYPOR). 383:(acetaminophen) metabolism. The 379:—one of the enzymes involved in 1474: 1435: 1386: 1368:Ortiz de Montellano PR (2005). 870:Drug Metabolism and Disposition 814: 730:, converting Fe(III) to Fe(II). 342: 299:chains, broadly categorized as 1167: 1118: 1039: 997:"The cytochrome p450 homepage" 988: 968: 567:to transfer electrons to P450. 13: 1: 1102:10.1016/S1569-2558(08)60339-2 905: 647:Related hydroxylation enzymes 183:Available protein structures: 1290:10.1016/0006-291X(79)91916-8 1255:10.1016/0022-2836(87)90190-2 1243:Journal of Molecular Biology 1060:10.1016/j.bbapap.2010.08.008 683: 666: 7: 3527: 1411:10.1021/acs.chemrev.7b00373 1143:10.1021/acs.chemrev.3c00727 856:Cytochrome P450 engineering 828: 10: 3835: 3819:Integral membrane proteins 1452:10.1016/j.niox.2021.04.001 1185:consensus pattern for P450 995:Nelson DR (October 2009). 542:Mitochondrial P450 systems 494: 335:(and eventually molecular 29: 3684: 3676:Michaelis–Menten kinetics 3648: 3617: 3586: 3535: 3463: 3438: 3367: 3137: 2915: 2834: 2692: 2509: 2438: 2398: 2307: 2276: 2211: 2178: 2152: 2117: 2110: 2085: 2064: 2029: 1922: 1862: 1823: 1756: 1745: 1736: 1659: 1584: 1577: 1568: 1559: 742:cytochrome P450 reductase 737:similar to oxy-myoglobin. 724:cytochrome P450 reductase 514:cytochrome P450 reductase 453:anosterol) and activity ( 415:synthase, abbreviated to 323:state and complexed with 225: 205: 187: 182: 178: 166: 154: 142: 130: 110: 98: 86: 74: 66: 61: 45: 40: 3568:Diffusion-limited enzyme 1014:10.1186/1479-7364-4-1-59 954:10.2174/1389200023337054 809:oxygen rebound mechanism 795:Oxygen rebound mechanism 655:reactions (insertion of 470:Cytochrome P450 Homepage 315:of the enzyme (450  1336:10.1126/science.1193478 942:Current Drug Metabolism 505:Microsomal P450 systems 497:P450-containing systems 301:P450-containing systems 18:Cytochrome P450 oxidase 976:"NCBI sequence viewer" 882:10.1124/dmd.31.12.1461 798: 726:or another associated 680: 556:Bacterial P450 systems 3661:Eadie–Hofstee diagram 3594:Allosteric regulation 793: 674: 639:+ NADPH + H → ROH + H 621:allene oxide synthase 617:prostacyclin synthase 547:adrenodoxin reductase 30:Further information: 3671:Lineweaver–Burk plot 1081:Hanukoglu I (1996). 619:(CYP8), and CYP74A ( 613:thromboxane synthase 605:is fused to the CYP. 597:species, in which a 591:originally found in 561:ferredoxin reductase 319:) when it is in the 2072:Glycated hemoglobin 2042:Carbaminohemoglobin 1328:2010Sci...330..933R 1090:Adv. Mol. Cell Biol 755:, reducing the Fe-O 677:radical heme ligand 601:-domain-containing 588:FMN/Fd/P450 systems 3630:Enzyme superfamily 3563:Enzyme promiscuity 1446:. 111–112: 45–63. 1178:2019-10-18 at the 799: 681: 475:2010-06-27 at the 313:absorption maximum 305:spectrophotometric 3786: 3785: 3495: 3494: 2223: 2222: 2174: 2173: 2170: 2169: 2106: 2105: 2037:Carboxyhemoglobin 2025: 2024: 1918: 1917: 1732: 1731: 1495:10.1021/cr500056m 1379:978-0-306-48324-0 1322:(6006): 933–937. 1212:10.1021/cr020443g 1111:978-0-7623-0113-3 923:"Cytochrome P450" 876:(12): 1461–1473. 608:P450 only systems 297:electron transfer 241: 240: 237: 236: 232:structure summary 16:(Redirected from 3826: 3809:Pharmacokinetics 3666:Hanes–Woolf plot 3609:Enzyme activator 3604:Enzyme inhibitor 3578:Enzyme catalysis 3522: 3515: 3508: 3499: 3498: 2267:(Most belong to 2250: 2243: 2236: 2227: 2226: 2115: 2114: 1754: 1753: 1743: 1742: 1582: 1581: 1575: 1574: 1566: 1565: 1537: 1530: 1523: 1514: 1513: 1507: 1506: 1489:(7): 2532–2558. 1483:Chemical Reviews 1478: 1472: 1471: 1439: 1433: 1432: 1422: 1405:(5): 2491–2553. 1399:Chemical Reviews 1390: 1384: 1383: 1365: 1356: 1355: 1311: 1302: 1301: 1273: 1267: 1266: 1238: 1232: 1231: 1206:(9): 3947–3980. 1200:Chemical Reviews 1195: 1186: 1171: 1165: 1164: 1154: 1137:(3): 1288–1320. 1131:Chemical Reviews 1122: 1116: 1115: 1087: 1078: 1072: 1071: 1043: 1037: 1036: 1026: 1016: 992: 986: 985: 983: 982: 972: 966: 965: 937: 931: 930: 919: 901: 845: 840: 839: 277:Escherichia coli 244:Cytochromes P450 180: 179: 50: 38: 37: 27:Class of enzymes 21: 3834: 3833: 3829: 3828: 3827: 3825: 3824: 3823: 3799:Cytochrome P450 3789: 3788: 3787: 3782: 3694:Oxidoreductases 3680: 3656:Enzyme kinetics 3644: 3640:List of enzymes 3613: 3582: 3553:Catalytic triad 3531: 3526: 3496: 3491: 3459: 3434: 3396:Halloween genes 3363: 3133: 2911: 2830: 2688: 2505: 2434: 2394: 2303: 2272: 2265:cytochrome P450 2254: 2224: 2219: 2207: 2196:Cytochrome P450 2166: 2148: 2102: 2081: 2060: 2051:Deoxyhemoglobin 2021: 2017: 2013: 2003: 1999: 1989: 1985: 1975: 1971: 1961: 1957: 1947: 1937: 1914: 1910: 1906: 1896: 1892: 1887: 1879: 1875: 1858: 1854: 1850: 1840: 1836: 1819: 1815: 1811: 1806:HbE Portland II 1801: 1797: 1787: 1783: 1773: 1769: 1748: 1728: 1655: 1586:Alpha locus on 1555: 1541: 1511: 1510: 1479: 1475: 1440: 1436: 1391: 1387: 1380: 1366: 1359: 1312: 1305: 1274: 1270: 1239: 1235: 1196: 1189: 1180:Wayback Machine 1172: 1168: 1123: 1119: 1112: 1085: 1079: 1075: 1044: 1040: 993: 989: 980: 978: 974: 973: 969: 938: 934: 921: 920: 913: 908: 864: 862:Further reading 841: 834: 831: 817: 764:P450 Compound 1 758: 753: 735:dioxygen adduct 712: 710:Catalytic cycle 686: 669: 649: 644: 642: 638: 584: 577: 573: 559:which employ a 538: 532: 526: 521: 499: 493: 477:Wayback Machine 437: 414: 402: 396: 345: 325:carbon monoxide 132:OPM superfamily 57: 41:Cytochrome P450 34: 28: 23: 22: 15: 12: 11: 5: 3832: 3822: 3821: 3816: 3811: 3806: 3801: 3784: 3783: 3781: 3780: 3767: 3754: 3741: 3728: 3715: 3702: 3688: 3686: 3682: 3681: 3679: 3678: 3673: 3668: 3663: 3658: 3652: 3650: 3646: 3645: 3643: 3642: 3637: 3632: 3627: 3621: 3619: 3618:Classification 3615: 3614: 3612: 3611: 3606: 3601: 3596: 3590: 3588: 3584: 3583: 3581: 3580: 3575: 3570: 3565: 3560: 3555: 3550: 3545: 3539: 3537: 3533: 3532: 3525: 3524: 3517: 3510: 3502: 3493: 3492: 3490: 3489: 3482: 3475: 3467: 3465: 3461: 3460: 3458: 3457: 3450: 3442: 3440: 3436: 3435: 3433: 3432: 3425: 3393: 3392: 3391: 3379: 3371: 3369: 3365: 3364: 3362: 3361: 3354: 3347: 3340: 3333: 3326: 3325: 3324: 3317: 3305: 3298: 3291: 3284: 3283: 3282: 3279: 3269: 3262: 3255: 3248: 3241: 3234: 3227: 3220: 3219: 3218: 3213: 3201: 3200: 3199: 3194: 3182: 3175: 3174: 3173: 3168: 3156: 3149: 3141: 3139: 3135: 3134: 3132: 3131: 3124: 3117: 3110: 3103: 3096: 3074: 3056: 3014: 2998: 2984: 2972: 2965: 2958: 2919: 2917: 2913: 2912: 2910: 2909: 2902: 2901: 2900: 2890: 2889: 2888: 2876: 2875: 2874: 2862: 2855: 2838: 2836: 2832: 2831: 2829: 2828: 2818: 2808: 2798: 2791: 2781: 2761: 2741: 2734: 2724: 2717: 2707: 2696: 2694: 2690: 2689: 2687: 2686: 2676: 2666: 2659: 2649: 2642: 2635: 2628: 2621: 2614: 2582: 2575: 2568: 2554: 2540: 2524: 2513: 2511: 2507: 2506: 2504: 2503: 2498: 2493: 2488: 2483: 2478: 2473: 2468: 2463: 2458: 2453: 2448: 2442: 2440: 2436: 2435: 2433: 2432: 2427: 2422: 2417: 2412: 2406: 2404: 2396: 2395: 2393: 2392: 2387: 2382: 2377: 2372: 2367: 2362: 2357: 2352: 2347: 2342: 2337: 2332: 2327: 2322: 2317: 2311: 2309: 2305: 2304: 2302: 2301: 2296: 2291: 2286: 2280: 2278: 2274: 2273: 2253: 2252: 2245: 2238: 2230: 2221: 2220: 2212: 2209: 2208: 2206: 2205: 2200: 2199: 2198: 2193: 2182: 2180: 2176: 2175: 2172: 2171: 2168: 2167: 2165: 2164: 2158: 2156: 2150: 2149: 2147: 2146: 2141: 2136: 2135: 2134: 2123: 2121: 2112: 2108: 2107: 2104: 2103: 2101: 2100: 2098:Erythrocruorin 2095: 2089: 2087: 2083: 2082: 2080: 2079: 2074: 2068: 2066: 2062: 2061: 2059: 2058: 2056:Sulfhemoglobin 2053: 2044: 2039: 2033: 2031: 2027: 2026: 2023: 2022: 2020: 2019: 2015: 2011: 2005: 2001: 1997: 1991: 1987: 1983: 1977: 1973: 1969: 1963: 1959: 1955: 1949: 1945: 1939: 1935: 1928: 1926: 1920: 1919: 1916: 1915: 1913: 1912: 1908: 1904: 1898: 1894: 1890: 1885: 1881: 1877: 1873: 1866: 1864: 1860: 1859: 1857: 1856: 1852: 1848: 1842: 1838: 1834: 1827: 1825: 1821: 1820: 1818: 1817: 1813: 1809: 1803: 1799: 1795: 1792:HbE Portland I 1789: 1785: 1781: 1775: 1771: 1767: 1760: 1758: 1751: 1740: 1734: 1733: 1730: 1729: 1727: 1726: 1725: 1724: 1714: 1713: 1712: 1707: 1697: 1696: 1695: 1685: 1684: 1683: 1672: 1670: 1657: 1656: 1654: 1653: 1652: 1651: 1641: 1640: 1639: 1629: 1628: 1627: 1617: 1616: 1615: 1610: 1605: 1594: 1592: 1579: 1572: 1563: 1557: 1556: 1540: 1539: 1532: 1525: 1517: 1509: 1508: 1473: 1434: 1385: 1378: 1357: 1303: 1284:(3): 925–932. 1268: 1249:(3): 687–700. 1233: 1187: 1166: 1117: 1110: 1073: 1038: 1001:Human Genomics 987: 967: 948:(6): 561–597. 932: 910: 909: 907: 904: 903: 902: 863: 860: 859: 858: 853: 847: 846: 843:Biology portal 830: 827: 816: 813: 805: 804: 788: 787: 783: 760: 756: 751: 738: 731: 720: 711: 708: 685: 682: 668: 665: 648: 645: 640: 636: 634: 625: 624: 609: 606: 589: 586: 582: 579: 575: 571: 568: 557: 554: 543: 540: 536: 530: 524: 519: 506: 495:Main article: 492: 491:Classification 489: 435: 412: 400: 394: 344: 341: 331:to reduce the 272:monooxygenases 239: 238: 235: 234: 229: 223: 222: 209: 203: 202: 192: 185: 184: 176: 175: 170: 164: 163: 158: 152: 151: 146: 140: 139: 134: 128: 127: 114: 108: 107: 102: 96: 95: 90: 84: 83: 78: 72: 71: 68: 64: 63: 59: 58: 51: 43: 42: 26: 9: 6: 4: 3: 2: 3831: 3820: 3817: 3815: 3812: 3810: 3807: 3805: 3802: 3800: 3797: 3796: 3794: 3778: 3774: 3773: 3768: 3765: 3761: 3760: 3755: 3752: 3748: 3747: 3742: 3739: 3735: 3734: 3729: 3726: 3722: 3721: 3716: 3713: 3709: 3708: 3703: 3700: 3696: 3695: 3690: 3689: 3687: 3683: 3677: 3674: 3672: 3669: 3667: 3664: 3662: 3659: 3657: 3654: 3653: 3651: 3647: 3641: 3638: 3636: 3635:Enzyme family 3633: 3631: 3628: 3626: 3623: 3622: 3620: 3616: 3610: 3607: 3605: 3602: 3600: 3599:Cooperativity 3597: 3595: 3592: 3591: 3589: 3585: 3579: 3576: 3574: 3571: 3569: 3566: 3564: 3561: 3559: 3558:Oxyanion hole 3556: 3554: 3551: 3549: 3546: 3544: 3541: 3540: 3538: 3534: 3530: 3523: 3518: 3516: 3511: 3509: 3504: 3503: 3500: 3488: 3487: 3483: 3481: 3480: 3476: 3474: 3473: 3469: 3468: 3466: 3462: 3456: 3455: 3451: 3449: 3448: 3444: 3443: 3441: 3437: 3431: 3430: 3426: 3423: 3419: 3418: 3413: 3409: 3405: 3401: 3397: 3394: 3390: 3387: 3386: 3385: 3384: 3380: 3378: 3377: 3373: 3372: 3370: 3366: 3360: 3359: 3355: 3353: 3352: 3348: 3346: 3345: 3341: 3339: 3338: 3334: 3332: 3331: 3327: 3323: 3322: 3318: 3316: 3315: 3311: 3310: 3309: 3306: 3304: 3303: 3299: 3297: 3296: 3292: 3290: 3289: 3285: 3280: 3277: 3276: 3275: 3274: 3270: 3268: 3267: 3263: 3261: 3260: 3256: 3254: 3253: 3249: 3247: 3246: 3242: 3240: 3239: 3235: 3233: 3232: 3228: 3226: 3225: 3221: 3217: 3214: 3212: 3209: 3208: 3207: 3206: 3202: 3198: 3195: 3193: 3190: 3189: 3188: 3187: 3183: 3181: 3180: 3176: 3172: 3169: 3167: 3164: 3163: 3162: 3161: 3157: 3155: 3154: 3150: 3148: 3147: 3143: 3142: 3140: 3136: 3130: 3129: 3125: 3123: 3122: 3118: 3116: 3115: 3111: 3109: 3108: 3104: 3102: 3101: 3097: 3094: 3090: 3086: 3082: 3078: 3075: 3072: 3068: 3064: 3060: 3057: 3054: 3050: 3046: 3042: 3038: 3034: 3030: 3026: 3022: 3018: 3015: 3012: 3008: 3004: 3003: 2999: 2996: 2992: 2988: 2985: 2982: 2978: 2977: 2973: 2971: 2970: 2966: 2964: 2963: 2959: 2956: 2952: 2948: 2944: 2940: 2936: 2932: 2928: 2924: 2921: 2920: 2918: 2914: 2908: 2907: 2903: 2899: 2896: 2895: 2894: 2891: 2887: 2884: 2883: 2882: 2881: 2877: 2873: 2870: 2869: 2868: 2867: 2863: 2861: 2860: 2856: 2853: 2849: 2845: 2844: 2840: 2839: 2837: 2833: 2826: 2822: 2819: 2816: 2812: 2809: 2806: 2802: 2799: 2797: 2796: 2792: 2789: 2785: 2782: 2779: 2775: 2771: 2767: 2766: 2762: 2759: 2755: 2751: 2747: 2746: 2742: 2740: 2739: 2735: 2732: 2728: 2725: 2723: 2722: 2718: 2715: 2711: 2708: 2705: 2701: 2698: 2697: 2695: 2691: 2684: 2680: 2677: 2674: 2670: 2667: 2665: 2664: 2660: 2657: 2653: 2650: 2648: 2647: 2643: 2641: 2640: 2636: 2634: 2633: 2629: 2627: 2626: 2622: 2620: 2619: 2615: 2612: 2608: 2604: 2600: 2596: 2592: 2588: 2587: 2583: 2581: 2580: 2576: 2574: 2573: 2569: 2566: 2562: 2558: 2555: 2552: 2548: 2544: 2541: 2538: 2534: 2530: 2529: 2525: 2522: 2518: 2515: 2514: 2512: 2508: 2502: 2499: 2497: 2494: 2492: 2489: 2487: 2484: 2482: 2479: 2477: 2474: 2472: 2469: 2467: 2464: 2462: 2459: 2457: 2454: 2452: 2449: 2447: 2444: 2443: 2441: 2437: 2431: 2428: 2426: 2423: 2421: 2418: 2416: 2413: 2411: 2408: 2407: 2405: 2402: 2397: 2391: 2388: 2386: 2383: 2381: 2378: 2376: 2373: 2371: 2368: 2366: 2363: 2361: 2358: 2356: 2353: 2351: 2348: 2346: 2343: 2341: 2338: 2336: 2333: 2331: 2328: 2326: 2323: 2321: 2318: 2316: 2313: 2312: 2310: 2306: 2300: 2297: 2295: 2292: 2290: 2287: 2285: 2282: 2281: 2279: 2275: 2270: 2266: 2262: 2258: 2251: 2246: 2244: 2239: 2237: 2232: 2231: 2228: 2218: 2217: 2210: 2204: 2203:Methemalbumin 2201: 2197: 2194: 2192: 2189: 2188: 2187: 2184: 2183: 2181: 2177: 2163: 2162:Leghemoglobin 2160: 2159: 2157: 2155: 2151: 2145: 2142: 2140: 2137: 2133: 2130: 2129: 2128: 2125: 2124: 2122: 2120: 2116: 2113: 2109: 2099: 2096: 2094: 2093:Chlorocruorin 2091: 2090: 2088: 2084: 2078: 2077:Methemoglobin 2075: 2073: 2070: 2069: 2067: 2063: 2057: 2054: 2052: 2048: 2047:Oxyhemoglobin 2045: 2043: 2040: 2038: 2035: 2034: 2032: 2028: 2009: 2006: 1995: 1992: 1981: 1978: 1967: 1964: 1953: 1950: 1943: 1940: 1933: 1930: 1929: 1927: 1925: 1921: 1902: 1899: 1888: 1882: 1871: 1868: 1867: 1865: 1861: 1846: 1843: 1832: 1829: 1828: 1826: 1822: 1807: 1804: 1793: 1790: 1779: 1776: 1765: 1762: 1761: 1759: 1755: 1752: 1750: 1744: 1741: 1739: 1735: 1723: 1720: 1719: 1718: 1715: 1711: 1708: 1706: 1703: 1702: 1701: 1698: 1694: 1691: 1690: 1689: 1686: 1682: 1679: 1678: 1677: 1674: 1673: 1671: 1669: 1667: 1663: 1658: 1650: 1647: 1646: 1645: 1642: 1638: 1635: 1634: 1633: 1630: 1626: 1623: 1622: 1621: 1618: 1614: 1611: 1609: 1606: 1604: 1601: 1600: 1599: 1596: 1595: 1593: 1591: 1589: 1583: 1580: 1576: 1573: 1571: 1567: 1564: 1562: 1558: 1553: 1549: 1546:that contain 1545: 1538: 1533: 1531: 1526: 1524: 1519: 1518: 1515: 1504: 1500: 1496: 1492: 1488: 1484: 1477: 1469: 1465: 1461: 1457: 1453: 1449: 1445: 1438: 1430: 1426: 1421: 1416: 1412: 1408: 1404: 1400: 1396: 1389: 1381: 1375: 1371: 1364: 1362: 1353: 1349: 1345: 1341: 1337: 1333: 1329: 1325: 1321: 1317: 1310: 1308: 1299: 1295: 1291: 1287: 1283: 1279: 1272: 1264: 1260: 1256: 1252: 1248: 1244: 1237: 1229: 1225: 1221: 1217: 1213: 1209: 1205: 1201: 1194: 1192: 1184: 1181: 1177: 1174: 1170: 1162: 1158: 1153: 1148: 1144: 1140: 1136: 1132: 1128: 1121: 1113: 1107: 1103: 1099: 1095: 1091: 1084: 1077: 1069: 1065: 1061: 1057: 1053: 1049: 1042: 1034: 1030: 1025: 1020: 1015: 1010: 1006: 1002: 998: 991: 977: 971: 963: 959: 955: 951: 947: 943: 936: 928: 924: 918: 916: 911: 899: 895: 891: 887: 883: 879: 875: 871: 866: 865: 857: 854: 852: 849: 848: 844: 838: 833: 826: 823: 812: 810: 801: 800: 796: 792: 784: 781: 777: 773: 769: 765: 761: 754: 747: 743: 739: 736: 732: 729: 725: 721: 718: 714: 713: 707: 705: 701: 697: 694: 691: 678: 673: 664: 662: 658: 654: 653:hydroxylation 633: 631: 622: 618: 614: 610: 607: 604: 600: 596: 595: 590: 587: 580: 578:/P450 systems 569: 566: 562: 558: 555: 552: 548: 545:which employ 544: 541: 534: 522: 515: 511: 507: 504: 503: 502: 498: 488: 486: 482: 478: 474: 471: 467: 462: 461:ethylation). 460: 456: 452: 448: 444: 440: 434: 430: 426: 422: 418: 410: 406: 397: 390: 386: 382: 378: 374: 370: 369: 364: 360: 356: 353: 349: 340: 338: 334: 330: 326: 322: 318: 314: 310: 306: 302: 298: 293: 291: 287: 283: 279: 278: 273: 269: 265: 261: 257: 253: 249: 245: 233: 230: 228: 224: 221: 217: 213: 210: 208: 204: 200: 196: 193: 190: 186: 181: 177: 174: 171: 169: 165: 162: 159: 157: 153: 150: 147: 145: 141: 138: 135: 133: 129: 126: 122: 118: 115: 113: 109: 106: 103: 101: 97: 94: 91: 89: 85: 82: 79: 77: 73: 69: 65: 60: 55: 49: 44: 39: 36: 33: 19: 3772:Translocases 3769: 3756: 3743: 3730: 3717: 3707:Transferases 3704: 3691: 3548:Binding site 3484: 3477: 3470: 3452: 3445: 3427: 3421: 3415: 3411: 3407: 3403: 3399: 3381: 3374: 3356: 3349: 3342: 3335: 3328: 3319: 3312: 3307: 3300: 3293: 3286: 3271: 3264: 3257: 3250: 3243: 3236: 3229: 3222: 3203: 3184: 3177: 3158: 3151: 3144: 3126: 3119: 3112: 3105: 3098: 3076: 3058: 3016: 3000: 2986: 2974: 2967: 2960: 2922: 2904: 2892: 2878: 2864: 2857: 2841: 2820: 2810: 2800: 2793: 2783: 2763: 2743: 2736: 2726: 2719: 2709: 2699: 2678: 2668: 2661: 2651: 2644: 2637: 2630: 2623: 2616: 2584: 2577: 2570: 2556: 2542: 2526: 2516: 2264: 2213: 2195: 2191:Cytochrome b 2153: 2132:Metmyoglobin 2118: 1923: 1749:development: 1746: 1716: 1699: 1687: 1675: 1660: 1643: 1631: 1619: 1597: 1585: 1552:hemoproteins 1486: 1482: 1476: 1444:Nitric Oxide 1443: 1437: 1402: 1398: 1388: 1369: 1319: 1315: 1281: 1277: 1271: 1246: 1242: 1236: 1203: 1199: 1169: 1134: 1130: 1120: 1093: 1089: 1076: 1054:(1): 14–18. 1051: 1047: 1041: 1007:(1): 59–65. 1004: 1000: 990: 979:. Retrieved 970: 945: 941: 935: 926: 873: 869: 821: 818: 815:Spectroscopy 806: 763: 750:cytochrome b 703: 687: 650: 626: 592: 529:cytochrome b 518:Cytochrome b 500: 463: 458: 454: 450: 442: 438: 432: 428: 424: 420: 392: 388: 384: 372: 366: 354: 346: 343:Nomenclature 307:peak at the 294: 275: 251: 247: 243: 242: 35: 3543:Active site 2257:Cytochromes 2139:Neuroglobin 2065:Other human 1778:HbE Gower 2 1764:HbE Gower 1 782:is lacking. 780:iron(V)-oxo 772:delocalized 746:ferredoxins 594:Rhodococcus 551:adrenodoxin 409:thromboxane 381:paracetamol 363:gene family 359:superfamily 352:root symbol 290:xenobiotics 286:fatty acids 262:containing 256:superfamily 144:OPM protein 62:Identifiers 3814:Metabolism 3793:Categories 3746:Isomerases 3720:Hydrolases 3587:Regulation 3464:CYP701-999 3439:CYP501-699 3368:CYP301-499 3138:CYP101-281 2261:oxygenases 2186:Cytochrome 2144:Cytoglobin 1924:pathology: 1747:stages of 1662:Beta locus 1570:Hemoglobin 981:2007-11-19 906:References 825:affected. 717:heme group 632:to water: 565:ferredoxin 466:amino-acid 309:wavelength 195:structures 168:Membranome 3625:EC number 3472:CYP704B22 2214:see also 2127:Myoglobin 2030:Compounds 1901:HbF/Fetal 1831:HbF/Fetal 1757:Embryonic 1738:Tetramers 1468:233205099 1352:206528205 1096:: 29–55. 776:porphyrin 774:over the 728:reductase 684:Structure 667:Mechanism 603:reductase 533:reductase 368:italicize 329:electrons 105:PDOC00081 93:IPR001128 3649:Kinetics 3573:Cofactor 3536:Activity 3486:CYP720A1 3454:CYP504B1 3429:CYP318A1 3422:CYP315A1 3417:CYP314A1 3412:CYP307A2 3408:CYP307A1 3404:CYP306A1 3400:CYP302A1 3376:CYP303A1 3351:CYP199A2 3330:CYP176A1 3288:CYP154C3 3252:CYP125A1 3238:CYP119A1 3231:CYP113A1 3179:CYP106A2 3153:CYP102A1 3146:CYP101A1 2916:CYP71-99 2835:CYP51-69 2693:CYP21-49 2086:Nonhuman 1578:Subunits 1544:Proteins 1503:25763468 1460:33838343 1429:29286645 1344:21071661 1228:33927145 1220:15352783 1176:Archived 1161:38305159 1152:10923174 1068:20736090 1033:19951895 962:12369887 927:InterPro 898:43655270 890:14625342 829:See also 822:in vitro 803:diagram. 693:thiolate 690:cysteine 657:hydroxyl 643:O + NADP 615:(CYP5), 473:Archived 441:ynthase 357:for the 282:steroids 268:cofactor 254:) are a 212:RCSB PDB 88:InterPro 3804:EC 1.14 3759:Ligases 3529:Enzymes 3358:CYP255A 3337:CYP183A 3302:CYP161C 3295:CYP158A 3128:CYP99A3 3121:CYP97C1 3114:CYP93E1 3107:CYP90C1 3100:CYP88D6 2969:CYP73A1 2962:CYP72A1 2510:CYP5-20 1561:Globins 1420:5855008 1324:Bibcode 1316:Science 1263:3656428 1183:PROSITE 1024:3500189 700:PROSITE 630:reduced 483:names ( 447:CYP51A1 445:), and 321:reduced 311:of the 260:enzymes 161:cd00302 100:PROSITE 81:PF00067 3733:Lyases 3479:CYP710 3447:CYP503 3383:CYP305 3344:CYP197 3308:CYP170 3273:CYP152 3266:CYP147 3259:CYP139 3245:CYP123 3224:CYP111 3205:CYP109 3186:CYP107 3160:CYP105 2399:CYP3 ( 2154:plant: 2119:human: 1613:pseudo 1501:  1466:  1458:  1427:  1417:  1376:  1350:  1342:  1298:228675 1296:  1261:  1226:  1218:  1159:  1149:  1108:  1066:  1031:  1021:  960:  896:  888:  768:ferryl 696:ligand 635:RH + O 563:and a 481:allele 479:) and 417:TBXAS1 405:CYP5A1 389:CYP450 377:CYP2E1 373:CYP2E1 337:oxygen 227:PDBsum 201:  191:  125:SUPFAM 67:Symbol 3685:Types 3077:CYP81 3059:CYP80 3017:CYP79 3002:CYP76 2987:CYP75 2976:CYP74 2923:CYP71 2906:CYP61 2893:CYP56 2880:CYP55 2866:CYP53 2859:CYP52 2843:CYP51 2821:CYP46 2811:CYP39 2801:CYP35 2795:CYP29 2784:CYP28 2765:CYP27 2745:CYP26 2738:CYP25 2727:CYP24 2721:CYP23 2710:CYP22 2700:CYP21 2679:CYP20 2669:CYP19 2663:CYP18 2652:CYP17 2646:CYP16 2639:CYP15 2632:CYP14 2625:CYP13 2618:CYP12 2586:CYP11 2579:CYP10 2401:CYP3A 2271:1.14) 2179:Other 2111:Other 1942:Barts 1863:Adult 1824:Fetal 1464:S2CID 1348:S2CID 1224:S2CID 1086:(PDF) 894:S2CID 748:, or 651:Many 574:R/cyb 510:NADPH 348:Genes 266:as a 248:P450s 121:SCOPe 112:SCOP2 54:CYP51 3777:list 3770:EC7 3764:list 3757:EC6 3751:list 3744:EC5 3738:list 3731:EC4 3725:list 3718:EC3 3712:list 3705:EC2 3699:list 3692:EC1 2572:CYP9 2557:CYP8 2543:CYP7 2528:CYP6 2517:CYP5 2439:CYP4 2308:CYP2 2277:CYP1 1722:HBE1 1710:HBG2 1705:HBG1 1637:HBQ1 1608:HBA2 1603:HBA1 1548:heme 1499:PMID 1456:PMID 1425:PMID 1374:ISBN 1340:PMID 1294:PMID 1259:PMID 1216:PMID 1157:PMID 1106:ISBN 1064:PMID 1052:1814 1029:PMID 958:PMID 886:PMID 549:and 535:(CYB 523:(cyb 512:via 431:ane 423:hrom 399:P450 333:iron 264:heme 252:CYPs 220:PDBj 216:PDBe 199:ECOD 189:Pfam 149:2bdm 117:2cpp 76:Pfam 70:p450 2955:BA1 2951:AV1 2947:AJ4 2486:F22 2481:F12 2476:F11 2451:A22 2446:A11 2430:A43 2425:A37 2350:C19 2345:C18 2325:A13 2008:HbO 1994:HbE 1980:HbC 1966:HbS 1952:HbD 1932:HbH 1884:HbA 1870:HbA 1845:HbA 1693:HBD 1681:HBB 1664:on 1649:HBM 1625:HBZ 1491:doi 1487:115 1448:doi 1415:PMC 1407:doi 1403:118 1332:doi 1320:330 1286:doi 1251:doi 1247:195 1208:doi 1204:104 1147:PMC 1139:doi 1135:124 1098:doi 1056:doi 1019:PMC 1009:doi 950:doi 878:doi 599:FMN 570:CYB 539:R). 487:). 401:BM3 395:450 393:CYP 391:or 385:CYP 355:CYP 339:). 288:, 258:of 250:or 207:PDB 173:265 156:CDD 3795:: 3420:, 3414:, 3410:, 3406:, 3402:, 3398:( 3389:M2 3321:B1 3314:A1 3281:B1 3278:A1 3216:E1 3211:B1 3197:G1 3192:A1 3171:D7 3166:A1 3093:E9 3091:, 3089:E7 3087:, 3085:E3 3083:, 3081:E1 3071:G2 3069:, 3067:B1 3065:, 3063:A1 3053:D4 3051:, 3049:D3 3047:, 3045:D2 3043:, 3041:D1 3039:, 3037:B3 3035:, 3033:B2 3031:, 3029:B1 3027:, 3025:A2 3023:, 3021:A1 3011:M7 3009:, 3007:B6 2995:B1 2993:, 2991:A1 2981:D1 2953:, 2949:, 2945:, 2943:Z6 2941:, 2939:C4 2937:, 2935:C3 2933:, 2931:C2 2929:, 2927:C1 2898:A1 2886:A1 2872:A1 2852:F1 2850:, 2848:A1 2825:A1 2815:A1 2805:B1 2788:A1 2778:C1 2776:, 2774:B1 2772:, 2770:A1 2758:C1 2756:, 2754:B1 2752:, 2750:A1 2731:A1 2714:A1 2704:A2 2683:A1 2673:A1 2656:A1 2611:C1 2609:, 2607:B3 2605:, 2603:B2 2601:, 2599:B1 2597:, 2595:A2 2593:, 2591:A1 2565:B1 2563:, 2561:A1 2551:B1 2549:, 2547:A1 2537:M2 2535:, 2533:G1 2521:A1 2501:Z1 2496:X1 2491:V2 2471:F8 2466:F3 2461:F2 2456:B1 2420:A7 2415:A5 2410:A4 2390:W1 2385:U1 2380:S1 2375:R1 2370:J2 2365:F1 2360:E1 2355:D6 2340:C9 2335:C8 2330:B6 2320:A7 2315:A6 2299:B1 2294:A5 2289:A2 2284:A1 2269:EC 2263:: 2259:, 2010:(α 1996:(α 1982:(α 1968:(α 1954:(α 1944:(γ 1934:(β 1903:(α 1889:(α 1872:(α 1847:(α 1833:(α 1808:(ζ 1794:(ζ 1780:(α 1766:(ζ 1666:11 1588:16 1497:. 1485:. 1462:. 1454:. 1423:. 1413:. 1401:. 1397:. 1360:^ 1346:. 1338:. 1330:. 1318:. 1306:^ 1292:. 1282:90 1280:. 1257:. 1245:. 1222:. 1214:. 1202:. 1190:^ 1155:. 1145:. 1133:. 1129:. 1104:. 1094:14 1088:. 1062:. 1050:. 1027:. 1017:. 1003:. 999:. 956:. 944:. 925:. 914:^ 892:. 884:. 874:31 872:. 744:, 623:). 407:, 317:nm 284:, 218:; 214:; 197:/ 137:39 123:/ 119:/ 3779:) 3775:( 3766:) 3762:( 3753:) 3749:( 3740:) 3736:( 3727:) 3723:( 3714:) 3710:( 3701:) 3697:( 3521:e 3514:t 3507:v 3424:) 3095:) 3079:( 3073:) 3061:( 3055:) 3019:( 3013:) 3005:( 2997:) 2989:( 2983:) 2979:( 2957:) 2925:( 2854:) 2846:( 2827:) 2823:( 2817:) 2813:( 2807:) 2803:( 2790:) 2786:( 2780:) 2768:( 2760:) 2748:( 2733:) 2729:( 2716:) 2712:( 2706:) 2702:( 2685:) 2681:( 2675:) 2671:( 2658:) 2654:( 2613:) 2589:( 2567:) 2559:( 2553:) 2545:( 2539:) 2531:( 2523:) 2519:( 2403:) 2249:e 2242:t 2235:v 2049:/ 2018:) 2016:2 2014:β 2012:2 2004:) 2002:2 2000:β 1998:2 1990:) 1988:2 1986:β 1984:2 1976:) 1974:2 1972:β 1970:2 1962:) 1960:2 1958:β 1956:2 1948:) 1946:4 1938:) 1936:4 1911:) 1909:2 1907:γ 1905:2 1897:) 1895:2 1893:δ 1891:2 1886:2 1880:) 1878:2 1876:β 1874:2 1855:) 1853:2 1851:β 1849:2 1841:) 1839:2 1837:γ 1835:2 1816:) 1814:2 1812:β 1810:2 1802:) 1800:2 1798:γ 1796:2 1788:) 1786:2 1784:ε 1782:2 1774:) 1772:2 1770:ε 1768:2 1717:ε 1700:γ 1688:δ 1676:β 1668:: 1644:μ 1632:θ 1620:ζ 1598:α 1590:: 1554:) 1550:( 1536:e 1529:t 1522:v 1505:. 1493:: 1470:. 1450:: 1431:. 1409:: 1382:. 1354:. 1334:: 1326:: 1300:. 1288:: 1265:. 1253:: 1230:. 1210:: 1163:. 1141:: 1114:. 1100:: 1070:. 1058:: 1035:. 1011:: 1005:4 984:. 964:. 952:: 946:3 929:. 900:. 880:: 757:2 752:5 704:C 679:. 641:2 637:2 585:. 583:5 576:5 572:5 537:5 531:5 525:5 520:5 459:M 457:e 455:D 451:L 443:1 439:S 436:2 433:A 429:X 427:o 425:B 421:T 419:( 413:2 411:A 246:( 56:) 20:)

Index

Cytochrome P450 oxidase
Cytochrome P450 (individual enzymes)

CYP51
Pfam
PF00067
InterPro
IPR001128
PROSITE
PDOC00081
SCOP2
2cpp
SCOPe
SUPFAM
OPM superfamily
39
OPM protein
2bdm
CDD
cd00302
Membranome
265
Pfam
structures
ECOD
PDB
RCSB PDB
PDBe
PDBj
PDBsum

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