Knowledge (XXG)

Hydroxylation

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449: 469:, and is catalyzed by 2-oxoglutarate-dependent dioxygenases. When molecules are hydroxylated, they become more water‐soluble, which affects their structure and function. It can take place on several amino acids, like lysine, asparagine, aspartate and histidine, but the most frequently hydroxylated amino acid residue in human 544:
organisms to help them control excess amounts of phenylalanine residues. Hydroxylation of tyrosine residues is also very vital in living organisms because hydroxylation at C-3 of tyrosine creates 3,4- dihydroxy phenylalanine (DOPA), which is a precursor to hormones and can be converted into dopamine.
543:
Several endogenous proteins contain hydroxyphenylalanine and hydroxytyrosine residues. These residues are formed due to the hydroxylation of phenylalanine and tyrosine, a process in which the hydroxylation converts phenylalanine residues into tyrosine residues. This is very important in living
94:
Installing hydroxyl groups into organic compounds can be affected by various metal catalysts. Many such catalysts are biomimetic, i.e. they are inspired by or intended to mimic enzymes such as cytochrome P450.
387: 524:(vitamin C) to return the iron to its reduced state. Deprivation of ascorbate leads to deficiencies in proline hydroxylation, which leads to less stable collagen, which can manifest itself as the disease 247: 599:
Middleton, Elliott Jr; Kandaswami, Chithan; Theoharides, Theoharis C. (2000). "The Effects of Plant Flavonoids on Mammalian Cells: Implications for Inflammation, Heart Disease, and Cancer".
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at almost every 3rd residue in its amino acid sequence. Collagen consists of both 3‐hydroxyproline and 4‐hydroxyproline residues. Hydroxylation occurs at the γ-C atom, forming
1022: 489:(Hyp), which stabilizes the secondary structure of collagen due to the strong electronegative effects of oxygen. Proline hydroxylation is also a vital component of 442: 1853: 1015: 399:
itself is a slow and unselective hydroxylating agent, catalysts are required to accelerate the pace of the process and to introduce selectivity.
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Jia, Chengguo; Kitamura, Tsugio; Fujiwara, Yuzo (2001). "Catalytic Functionalization of Arenes and Alkanes via C−H Bond Activation".
783: 1848: 558: 497:. In some cases, proline may be hydroxylated instead on its β-C atom. Lysine may also be hydroxylated on its δ-C atom, forming 466: 1035: 1685: 158: 402:
Hydroxylation is often the first step in the degradation of organic compounds in air. Hydroxylation is important in
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Kolb, Hartmuth C.; Vannieuwenhze, Michael S.; Sharpless, K. Barry (1994). "Catalytic Asymmetric Dihydroxylation".
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that explains many iron-catalyzed hydroxylations: H-atom abstraction, oxygen rebound, alcohol decomplexation.
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Nelson, D. L.; Cox, M. M. "Lehninger, Principles of Biochemistry" 3rd Ed. Worth Publishing: New York, 2000.
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Hausinger RP (January–February 2004). "Fe(II)/α-ketoglutarate-dependent hydroxylases and related enzymes".
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One example of non-biological hydroxylation is the hydrogen peroxide hydroxylation of phenol to form
573: 509: 505: 100: 1069: 1141: 513: 427: 1490: 1480: 1384: 1234: 962: 879: 761: 553: 517: 1338: 1224: 1183: 985: 954: 919: 869: 835: 817: 779: 726: 643: 608: 490: 117: 1641: 1619: 1518: 1437: 1328: 1305: 1229: 1201: 946: 909: 861: 825: 809: 753: 716: 708: 697:"Beyond ferryl-mediated hydroxylation: 40 years of the rebound mechanism and C–H activation" 670: 635: 438: 66: 1752: 1452: 1343: 1219: 1178: 441:, hundreds of variations of which are known. Other hydroxylating agents include flavins, 152:
bond. Typical stoichiometries for the hydroxylation of a generic hydrocarbon are these:
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Zurlo, Giada; Guo, Jianping; Takada, Mamoru; Wei, Wenyi; Zhang, Qing (December 2016).
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Holmgren, Steven K; Bretscher, Lynn E; Taylor, Kimberly M; Raines, Ronald T (1999).
765: 1432: 1249: 1064: 1049: 579: 533: 133: 798:"New Insights into Protein Hydroxylation and Its Important Role in Human Diseases" 744:
Cerniglia, Carl E. (1992). "Biodegradation of polycyclic aromatic hydrocarbons".
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Co- and Post-Translational Modifications of Therapeutic Antibodies and Proteins
516:, respectively. These reactions require iron (as well as molecular oxygen and 1794: 1700: 1677: 1673: 1629: 1593: 1570: 1353: 1157: 1123: 1079: 950: 712: 411: 31: 821: 1823: 1736: 1546: 1465: 1412: 1376: 1315: 1292: 1239: 1170: 1102: 423: 54: 42: 35: 958: 923: 839: 730: 647: 612: 17: 1811: 1807: 1803: 1740: 1713: 1655: 1606: 1602: 1500: 1447: 1269: 1211: 1193: 504:
These three reactions are catalyzed by very large, multi-subunit enzymes
478: 674: 1771: 1763: 1744: 1717: 1528: 757: 474: 470: 445:(2-oxoglutarate-dependent dioxygenases), and some diiron hydroxylases. 431: 639: 148:
bond is converted to an alcohol by insertion of an oxygen atom into a
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refers to the location of hydroxy groups on a molecule or material.
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makes up about 25–35% of the protein in our bodies and contains a
447: 419: 536:
to combat scurvy on long ocean voyages; hence, they were called "
382:{\displaystyle {\ce {R3C-H + O2 + 2e- + 2H+ -> R3C-OH + H2O}}} 113: 27:
Chemical reaction which adds an –OH group to an organic compound
1004: 980:
Voet, Donald; Voet, Judith G.; Pratt, Charlotte W. (2016).
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Hydroxylation and hydroxylases are not to be confused with
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4-(p-hydroxybenzylidene)-5-imidazolinone (HBI) formation
802:
Biochimica et Biophysica Acta (BBA) - Reviews on Cancer
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T. Shantha Raju (2019), "Hydroxylation of Proteins",
528:. Since citrus fruits are rich in vitamin C, British 256: 161: 76:
refers to the number of OH groups in a molecule. The
1802: 1792: 1762: 1735: 1708: 1698: 1672: 1650: 1628: 1601: 1591: 1569: 1545: 1527: 1499: 1393: 1375: 1352: 1314: 1291: 1268: 1210: 1165: 1155: 1122: 1078: 1042: 136:, hydroxylation reactions are often facilitated by 1726:p-Hydroxybenzylidene-imidazolinone (HBI) formation 381: 241: 434:) are activated or deactivated by hydroxylation. 242:{\displaystyle {\ce {2R3C-H + O2 -> 2R3C-OH}}} 414:) products that are more readily removed by the 98:Whereas many hydroxylations insert O atoms into 437:The principal hydroxylation agent in nature is 1016: 112:is such a reaction: it converts alkenes into 53:(i) most commonly, hydroxylation describes a 8: 1686:Tryptophan tryptophylquinone (TTQ) formation 860:, John Wiley & Sons, pp. 119–131, 851: 849: 1799: 1705: 1598: 1162: 1023: 1009: 1001: 465:The hydroxylation of proteins occurs as a 443:alpha-ketoglutarate-dependent hydroxylases 108:OH groups to unsaturated substrates. The 913: 829: 720: 701:Journal of Biological Inorganic Chemistry 371: 366: 351: 344: 339: 326: 321: 309: 304: 294: 289: 274: 267: 262: 257: 255: 230: 223: 218: 213: 203: 198: 183: 176: 171: 166: 162: 160: 395: 1780:Methylidene-imidazolone (MIO) formation 591: 120:, which adds across the double bond of 520:) to carry out the oxidation, and use 1664:Lysine tyrosylquinone (LTQ) formation 686: 684: 116:. The hydroxy groups are provided by 7: 1137:Glycosyl phosphatidylinositol (GPI) 25: 1448:Oxidative deamination to aldehyde 1854:Post-translational modification 1036:posttranslational modifications 559:Cholesterol 7 alpha-hydroxylase 477:. This is due to the fact that 467:post-translational modification 898:"A hyperstable collagen mimic" 410:compounds into water-soluble ( 332: 207: 1: 939:Crit. Rev. Biochem. Mol. Biol 915:10.1016/S1074-5521(99)80003-9 628:Accounts of Chemical Research 1255:Topaquinone (TPQ) formation 814:10.1016/j.bbcan.2016.09.004 1870: 982:Principles of Biochemistry 866:10.1002/9781119053354.ch10 57:process that introduces a 29: 1699:Crosslinks between three 1032:Protein primary structure 951:10.1080/10409230490440541 713:10.1007/s00775-016-1414-3 569:Phenylalanine hydroxylase 495:hypoxia inducible factors 110:Sharpless dihydroxylation 1793:Crosslinks between four 454:oxygen rebound mechanism 128:Biological hydroxylation 90:Synthetic hydroxylations 78:pattern of hydroxylation 1849:Organic redox reactions 1592:Crosslinks between two 902:Chemistry & Biology 601:Pharmacological Reviews 85:Hydroxylation reactions 74:degree of hydroxylation 1240:Porphyrin ring linkage 984:. Wiley. p. 143. 564:Dopamine β-hydroxylase 457: 383: 243: 104:bonds, some reactions 1301:Succinimide formation 451: 384: 244: 1055:Protein biosynthesis 574:Tyrosine hydroxylase 510:prolyl 3-hydroxylase 506:prolyl 4-hydroxylase 254: 159: 675:10.1021/cr00032a009 514:lysyl 5-hydroxylase 374: 347: 297: 270: 226: 206: 179: 1385:Transglutamination 758:10.1007/BF00129093 458: 406:since it converts 379: 362: 335: 285: 258: 239: 214: 194: 167: 1836: 1835: 1832: 1831: 1788: 1787: 1694: 1693: 1587: 1586: 1339:Polyglutamylation 1225:Dephosphorylation 1184:Dephosphorylation 991:978-1-119-45166-2 875:978-1-119-05335-4 640:10.1021/ar000209h 377: 365: 358: 350: 338: 325: 308: 288: 281: 273: 261: 237: 229: 217: 197: 190: 182: 170: 118:hydrogen peroxide 16:(Redirected from 1861: 1800: 1706: 1642:Sulfilimine bond 1620:ADP-ribosylation 1599: 1519:ADP-ribosylation 1438:ADP-ribosylation 1329:ADP-ribosylation 1306:ADP-ribosylation 1230:ADP-ribosylation 1202:ADP-ribosylation 1163: 1156:Single specific 1025: 1018: 1011: 1002: 996: 995: 977: 971: 970: 934: 928: 927: 917: 893: 887: 886: 853: 844: 843: 833: 793: 787: 776: 770: 769: 752:(2–3): 351–368. 741: 735: 734: 724: 707:(2–3): 185–207. 688: 679: 678: 669:(8): 2483–2547. 663:Chemical Reviews 658: 652: 651: 623: 617: 616: 596: 439:cytochrome P-450 398: 388: 386: 385: 380: 378: 375: 373: 370: 363: 356: 355: 348: 346: 343: 336: 331: 330: 323: 314: 313: 306: 296: 293: 286: 279: 278: 271: 269: 266: 259: 248: 246: 245: 240: 238: 235: 234: 227: 225: 222: 215: 205: 202: 195: 188: 187: 180: 178: 175: 168: 151: 147: 103: 67:organic compound 64: 21: 1869: 1868: 1864: 1863: 1862: 1860: 1859: 1858: 1839: 1838: 1837: 1828: 1784: 1758: 1731: 1690: 1668: 1646: 1624: 1583: 1579:C-mannosylation 1565: 1541: 1523: 1495: 1461:Imine formation 1389: 1371: 1348: 1344:Polyglycylation 1310: 1287: 1264: 1220:Phosphorylation 1206: 1179:Phosphorylation 1151: 1118: 1074: 1038: 1029: 999: 992: 979: 978: 974: 936: 935: 931: 895: 894: 890: 876: 855: 854: 847: 795: 794: 790: 777: 773: 743: 742: 738: 690: 689: 682: 660: 659: 655: 625: 624: 620: 598: 597: 593: 589: 554:17α-Hydroxylase 550: 518:α-ketoglutarate 463: 397: 393: 322: 305: 252: 251: 157: 156: 149: 145: 130: 99: 92: 87: 62: 39: 28: 23: 22: 15: 12: 11: 5: 1867: 1865: 1857: 1856: 1851: 1841: 1840: 1834: 1833: 1830: 1829: 1827: 1826: 1820: 1818: 1797: 1790: 1789: 1786: 1785: 1783: 1782: 1776: 1774: 1760: 1759: 1757: 1756: 1749: 1747: 1733: 1732: 1730: 1729: 1722: 1720: 1703: 1696: 1695: 1692: 1691: 1689: 1688: 1682: 1680: 1670: 1669: 1667: 1666: 1660: 1658: 1648: 1647: 1645: 1644: 1638: 1636: 1626: 1625: 1623: 1622: 1617: 1615:Disulfide bond 1611: 1609: 1596: 1589: 1588: 1585: 1584: 1582: 1581: 1575: 1573: 1567: 1566: 1564: 1563: 1558: 1551: 1549: 1543: 1542: 1540: 1539: 1533: 1531: 1525: 1524: 1522: 1521: 1516: 1511: 1509:Citrullination 1505: 1503: 1497: 1496: 1494: 1493: 1488: 1486:Propionylation 1483: 1478: 1473: 1468: 1463: 1458: 1456:-glycosylation 1450: 1445: 1440: 1435: 1430: 1428:Ubiquitination 1425: 1420: 1415: 1410: 1405: 1399: 1397: 1391: 1390: 1388: 1387: 1381: 1379: 1373: 1372: 1370: 1369: 1364: 1358: 1356: 1350: 1349: 1347: 1346: 1341: 1336: 1331: 1326: 1320: 1318: 1312: 1311: 1309: 1308: 1303: 1297: 1295: 1289: 1288: 1286: 1285: 1280: 1278:Palmitoylation 1274: 1272: 1266: 1265: 1263: 1262: 1260:Detyrosination 1257: 1252: 1250:Flavin linkage 1247: 1242: 1237: 1232: 1227: 1222: 1216: 1214: 1208: 1207: 1205: 1204: 1199: 1191: 1186: 1181: 1175: 1173: 1160: 1153: 1152: 1150: 1149: 1147:Detyrosination 1144: 1139: 1134: 1128: 1126: 1120: 1119: 1117: 1116: 1113:Myristoylation 1110: 1105: 1100: 1095: 1090: 1084: 1082: 1076: 1075: 1073: 1072: 1070:N–O acyl shift 1067: 1062: 1057: 1052: 1046: 1044: 1040: 1039: 1030: 1028: 1027: 1020: 1013: 1005: 998: 997: 990: 972: 929: 888: 874: 845: 808:(2): 208–220. 788: 771: 746:Biodegradation 736: 680: 653: 634:(8): 633–639. 618: 607:(4): 673–751. 590: 588: 585: 584: 583: 576: 571: 566: 561: 556: 549: 546: 487:hydroxyproline 483:hydroxyproline 462: 459: 430:(for example, 404:detoxification 390: 389: 369: 361: 354: 342: 334: 329: 320: 317: 312: 303: 300: 292: 284: 277: 265: 249: 233: 221: 212: 209: 201: 193: 186: 174: 165: 129: 126: 91: 88: 86: 83: 82: 81: 70: 59:hydroxyl group 49:can refer to: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1866: 1855: 1852: 1850: 1847: 1846: 1844: 1825: 1822: 1821: 1819: 1817: 1813: 1809: 1805: 1801: 1798: 1796: 1791: 1781: 1778: 1777: 1775: 1773: 1769: 1765: 1761: 1755:(chromophore) 1754: 1751: 1750: 1748: 1746: 1742: 1738: 1734: 1728:(chromophore) 1727: 1724: 1723: 1721: 1719: 1715: 1711: 1707: 1704: 1702: 1697: 1687: 1684: 1683: 1681: 1679: 1675: 1671: 1665: 1662: 1661: 1659: 1657: 1653: 1649: 1643: 1640: 1639: 1637: 1635: 1634:Hydroxylysine 1631: 1627: 1621: 1618: 1616: 1613: 1612: 1610: 1608: 1604: 1600: 1597: 1595: 1590: 1580: 1577: 1576: 1574: 1572: 1568: 1562: 1561:Adenylylation 1559: 1556: 1553: 1552: 1550: 1548: 1544: 1538: 1537:Hydroxylation 1535: 1534: 1532: 1530: 1526: 1520: 1517: 1515: 1512: 1510: 1507: 1506: 1504: 1502: 1498: 1492: 1489: 1487: 1484: 1482: 1479: 1477: 1476:Succinylation 1474: 1472: 1471:Carbamylation 1469: 1467: 1464: 1462: 1459: 1457: 1455: 1451: 1449: 1446: 1444: 1441: 1439: 1436: 1434: 1431: 1429: 1426: 1424: 1423:Hydroxylation 1421: 1419: 1418:Adenylylation 1416: 1414: 1411: 1409: 1406: 1404: 1401: 1400: 1398: 1396: 1392: 1386: 1383: 1382: 1380: 1378: 1374: 1368: 1367:Glycosylation 1365: 1363: 1360: 1359: 1357: 1355: 1351: 1345: 1342: 1340: 1337: 1335: 1332: 1330: 1327: 1325: 1324:Carboxylation 1322: 1321: 1319: 1317: 1313: 1307: 1304: 1302: 1299: 1298: 1296: 1294: 1290: 1284: 1281: 1279: 1276: 1275: 1273: 1271: 1267: 1261: 1258: 1256: 1253: 1251: 1248: 1246: 1245:Adenylylation 1243: 1241: 1238: 1236: 1233: 1231: 1228: 1226: 1223: 1221: 1218: 1217: 1215: 1213: 1209: 1203: 1200: 1198: 1196: 1192: 1190: 1189:Glycosylation 1187: 1185: 1182: 1180: 1177: 1176: 1174: 1172: 1168: 1164: 1161: 1159: 1154: 1148: 1145: 1143: 1142:O-methylation 1140: 1138: 1135: 1133: 1130: 1129: 1127: 1125: 1121: 1114: 1111: 1109: 1106: 1104: 1101: 1099: 1096: 1094: 1093:Carbamylation 1091: 1089: 1086: 1085: 1083: 1081: 1077: 1071: 1068: 1066: 1063: 1061: 1058: 1056: 1053: 1051: 1048: 1047: 1045: 1041: 1037: 1033: 1026: 1021: 1019: 1014: 1012: 1007: 1006: 1003: 993: 987: 983: 976: 973: 968: 964: 960: 956: 952: 948: 944: 940: 933: 930: 925: 921: 916: 911: 907: 903: 899: 892: 889: 885: 881: 877: 871: 867: 863: 859: 852: 850: 846: 841: 837: 832: 827: 823: 819: 815: 811: 807: 803: 799: 792: 789: 785: 784:1-57259-153-6 781: 775: 772: 767: 763: 759: 755: 751: 747: 740: 737: 732: 728: 723: 718: 714: 710: 706: 702: 698: 694: 693:Groves, J. T. 687: 685: 681: 676: 672: 668: 664: 657: 654: 649: 645: 641: 637: 633: 629: 622: 619: 614: 610: 606: 602: 595: 592: 586: 581: 577: 575: 572: 570: 567: 565: 562: 560: 557: 555: 552: 551: 547: 545: 541: 539: 535: 531: 527: 523: 522:ascorbic acid 519: 515: 511: 507: 502: 500: 499:hydroxylysine 496: 493:response via 492: 488: 484: 480: 476: 472: 468: 460: 455: 450: 446: 444: 440: 435: 433: 429: 425: 421: 417: 413: 409: 405: 400: 367: 359: 352: 340: 327: 318: 315: 310: 301: 298: 290: 282: 275: 263: 250: 231: 219: 210: 199: 191: 184: 172: 163: 155: 154: 153: 143: 139: 135: 127: 125: 123: 119: 115: 111: 107: 102: 96: 89: 84: 79: 75: 71: 68: 60: 56: 52: 51: 50: 48: 47:hydroxylation 44: 37: 33: 19: 1536: 1491:Butyrylation 1453: 1422: 1194: 1065:Racemization 1050:Peptide bond 981: 975: 945:(1): 21–68. 942: 938: 932: 908:(2): 63–70. 905: 901: 891: 857: 805: 801: 791: 774: 749: 745: 739: 704: 700: 666: 662: 656: 631: 627: 621: 604: 600: 594: 580:hydroquinone 542: 503: 464: 452:Steps in an 436: 401: 391: 142:hydroxylases 141: 134:biochemistry 131: 105: 97: 93: 77: 73: 46: 40: 1555:Diphthamide 1514:Methylation 1481:Lactylation 1443:Deamination 1433:Sumoylation 1408:Acetylation 1403:Methylation 1362:Deamidation 1334:Methylation 1283:Prenylation 1108:Methylation 1098:Formylation 1088:Acetylation 1060:Proteolysis 691:Huang, X.; 532:were given 461:Of proteins 412:hydrophilic 18:Hydroxylase 1843:Categories 1678:Tryptophan 1674:Tryptophan 1630:Methionine 1571:Tryptophan 1354:Asparagine 1124:C terminus 1080:N terminus 587:References 408:lipophilic 65:) into an 36:hydrolases 32:hydrolysis 1824:Desmosine 1737:Histidine 1557:formation 1547:Histidine 1466:Glycation 1413:Acylation 1377:Glutamine 1316:Glutamate 1293:Aspartate 1235:Sulfation 1171:Threonine 1132:Amidation 1103:Glycation 884:243626930 822:0006-3002 353:− 333:⟶ 311:− 276:− 232:− 208:⟶ 185:− 72:(ii) the 43:chemistry 1812:Allysine 1808:Allysine 1804:Allysine 1741:Tyrosine 1714:Tyrosine 1656:Tyrosine 1607:Cysteine 1603:Cysteine 1501:Arginine 1270:Cysteine 1212:Tyrosine 967:85784668 959:15121720 924:10021421 840:27663420 766:25516145 731:27909920 695:(2017). 648:11513570 613:11121513 548:Examples 479:collagen 471:proteins 432:steroids 426:. Some 424:excreted 55:chemical 1772:Glycine 1764:Alanine 1745:Glycine 1718:Glycine 1529:Proline 1197:-GlcNAc 1043:General 831:5138100 722:5350257 530:sailors 501:(Hyl). 491:hypoxia 475:proline 416:kidneys 140:called 138:enzymes 122:alkenes 1816:Lysine 1768:Serine 1710:Serine 1652:Lysine 1395:Lysine 1167:Serine 988:  965:  957:  922:  882:  872:  838:  828:  820:  782:  764:  729:  719:  646:  611:  538:limeys 526:scurvy 392:Since 1115:(Gly) 963:S2CID 880:S2CID 762:S2CID 534:limes 428:drugs 420:liver 114:diols 1034:and 986:ISBN 955:PMID 920:PMID 870:ISBN 836:PMID 818:ISSN 806:1866 780:ISBN 727:PMID 644:PMID 609:PMID 512:and 422:and 144:. A 34:and 1795:AAs 1701:AAs 1594:AAs 1158:AAs 947:doi 910:doi 862:doi 826:PMC 810:doi 754:doi 717:PMC 709:doi 671:doi 636:doi 540:". 473:is 418:or 150:C−H 146:C−H 132:In 106:add 101:C−H 63:−OH 41:In 1845:: 961:. 953:. 943:39 941:. 918:. 904:. 900:. 878:, 868:, 848:^ 834:. 824:. 816:. 804:. 800:. 760:. 748:. 725:. 715:. 705:22 703:. 699:. 683:^ 667:94 665:. 642:. 632:34 630:. 605:52 603:. 508:, 357:OH 236:OH 124:. 45:, 1814:– 1810:– 1806:– 1770:– 1766:– 1743:– 1739:– 1716:– 1712:– 1676:– 1654:– 1632:– 1605:– 1454:O 1195:O 1169:/ 1024:e 1017:t 1010:v 994:. 969:. 949:: 926:. 912:: 906:6 864:: 842:. 812:: 786:. 768:. 756:: 750:3 733:. 711:: 677:. 673:: 650:. 638:: 615:. 582:. 396:2 394:O 376:O 368:2 364:H 360:+ 349:C 341:3 337:R 328:+ 324:H 319:2 316:+ 307:e 302:2 299:+ 291:2 287:O 283:+ 280:H 272:C 264:3 260:R 228:C 220:3 216:R 211:2 200:2 196:O 192:+ 189:H 181:C 173:3 169:R 164:2 69:. 61:( 38:. 20:)

Index

Hydroxylase
hydrolysis
hydrolases
chemistry
chemical
hydroxyl group
organic compound
C−H
Sharpless dihydroxylation
diols
hydrogen peroxide
alkenes
biochemistry
enzymes
detoxification
lipophilic
hydrophilic
kidneys
liver
excreted
drugs
steroids
cytochrome P-450
alpha-ketoglutarate-dependent hydroxylases

oxygen rebound mechanism
post-translational modification
proteins
proline
collagen

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