P08686 (CP21A_HUMAN) Homo sapiens (Human)

Steroid 21-hydroxylase UniProtKBInterProSTRINGInteractive Modelling

494 aa; Sequence (Fasta) ; (Isoform 2; ) Identical sequences: Homo sapiens: K9LHU1

Sequence Features

 428Iron (heme axial ligand).
 9L -> LL (in allele CYP21A2*2). VAR_018363
 12L -> M (in AH3; non-classic form; unknown pathological significance; no effect on steroid 21-monooxygenase activity). VAR_077582
 15A -> T (in AH3; salt wasting form; unknown pathological significance; no significant difference in steroid 21- monooxygenase activity; dbSNP:rs63749090). VAR_026059 dbSNP
 16R -> C (decreased steroid 21- monooxygenase activity; dbSNP:rs757608533). VAR_077583 dbSNP
 30P -> L (in AH3; non-classic form; 10% of non-classic AH3 Texan patients; 50% steroid 21-monooxygenase activity; dbSNP:rs9378251). VAR_001281 dbSNP
 30P -> Q (in AH3; does not affect membrane binding; enzyme function abolished). VAR_026060
 56G -> R (in AH3; loss of activity; dbSNP:rs1413433421). VAR_065668 dbSNP
 62H -> L (in AH3; non-classic form; simple virilizing form when associated with a second mild mutation such as S-453 or L- 30; activity is significantly reduced in association with S-453; dbSNP:rs9378252). VAR_018364 dbSNP
 64G -> E (in AH3; no activity). VAR_007923
 77I -> T (in AH3; simple virilizing form; dbSNP:rs1333278223). VAR_065669 dbSNP
 90G -> V (in AH3). VAR_026061
 98K -> R (in dbSNP:rs1268071078). VAR_001282 dbSNP
 102K -> R (in allele CYP21A2*3; dbSNP:rs6474). VAR_001283 dbSNP
 105P -> L (in AH3; dbSNP:rs550051210). VAR_001284 dbSNP
 107L -> R (in AH3; loss of activity; dbSNP:rs957886272). VAR_065670 dbSNP
 113S -> F (in AH3; non-classic form; loss of steroid 21-monooxygenase activity; dbSNP:rs1296268275). VAR_077584 dbSNP
 121K -> Q (in AH3; non-classic form; reduced activity; decreased affinity for 17- hydroxyprogesterone and progesterone; dbSNP:rs547552654). VAR_065671 dbSNP
 124R -> H (in AH3; dbSNP:rs72552750). VAR_026062 dbSNP
 142L -> P (in AH3; loss of activity). VAR_065672
 167L -> P (in AH3; salt wasting form; loss of activity). VAR_065673
 169C -> R (in AH3; loss of hydroxylase activity toward 17-hydroxyprogesterone and progesterone). VAR_075372
 169C -> Y (in AH3). VAR_001285
 172I -> N (in AH3; simple virilizing form; 1-4% activity; dbSNP:rs6475). VAR_001286 dbSNP
 178G -> A (in AH3; dbSNP:rs72552751). VAR_026063 dbSNP
 178G -> R (in AH3; loss of enzymatic activity toward 17-hydroxyprogesterone and progesterone; dbSNP:rs772317717). VAR_075373 dbSNP
 183D -> E (in allele CYP21A2*4; dbSNP:rs397515531). VAR_001287 dbSNP
 191Y -> H (in AH3; exhibits low enzymatic activity toward 17-hydroxyprogesterone and progesterone). VAR_075374
 196Missing (in AH3; moderate). VAR_008688
 198L -> F (in AH3; dbSNP:rs143240527). VAR_075375 dbSNP
 202S -> G (decreased steroid 21- monooxygenase activity; dbSNP:rs372964292). VAR_077585 dbSNP
 211V -> L (in AH3; non-classic form; pathogenicity uncertain). VAR_026064
 230I -> T (in AH3). VAR_065674
 233R -> K (in AH3). VAR_065675
 236I -> N (in AH3; salt wasting form; dbSNP:rs111647200). VAR_001288 dbSNP
 237V -> E (in AH3; salt wasting form; dbSNP:rs12530380). VAR_001289 dbSNP
 239M -> K (in AH3; salt wasting form; dbSNP:rs6476). VAR_001290 dbSNP
 261L -> P (in AH3; dbSNP:rs750337015). VAR_026065 dbSNP
 267P -> L (decreased steroid 21- monooxygenase activity; dbSNP:rs61732108 and dbSNP:rs142028935). VAR_077586 dbSNP
 268S -> T (in allele CYP21A2*5; dbSNP:rs6472). VAR_001291 dbSNP
 281V -> G (in AH3; salt wasting form). VAR_026066
 281V -> L (in AH3; non-classic form; 50% activity; most common variant; normal KM but 20% reduced Vmax; dbSNP:rs6471). VAR_001292 dbSNP
 282H -> N (in AH3; exhibits low enzymatic activity toward 17-hydroxyprogesterone and progesterone). VAR_075376
 283M -> L (in AH3). VAR_026067
 291G -> C (in AH3). VAR_026068
 291G -> R (in AH3; dbSNP:rs201552310). VAR_018365 dbSNP
 291G -> S (in AH3; salt wasting form; less then 1% activity; dbSNP:rs201552310). VAR_001293 dbSNP
 292G -> D (in AH3; salt wasting form; less then 1% activity). VAR_065676
 300L -> F (in AH3; salt wasting form; dbSNP:rs765001985). VAR_026069 dbSNP
 301S -> Y (in AH3). VAR_018366
 302W -> R (in AH3; loss of enzymatic activity toward 17-hydroxyprogesterone and progesterone). VAR_075377
 304V -> M (in hyperandrogenism; due to 21- hydroxylase deficiency; non-classic type; residual activity of 46% for conversion of 17-hydroxyprogesterone and 26% for conversion of progesterone compared with the normal enzyme; dbSNP:rs151344505). VAR_026070 dbSNP
 317L -> M (in AH3). VAR_026071
 320E -> K (in AH3; simple virilizing form; 4% activity). VAR_065677
 339R -> H (in AH3; non-classic form; 50% activity; dbSNP:rs72552754). VAR_001294 dbSNP
 341R -> P (in AH3; simple virilizing form; dbSNP:rs747079101). VAR_018367 dbSNP
 341R -> W (in AH3; non-classic form; mild; dbSNP:rs72552755). VAR_001295 dbSNP
 354R -> C (in AH3; salt wasting form; dbSNP:rs772900496). VAR_026072 dbSNP
 354R -> H (in AH3; salt wasting form; dbSNP:rs760216630). VAR_026073 dbSNP
 356R -> P (in AH3; salt wasting form; 0.15% activity). VAR_001296
 356R -> Q (in AH3; simple virilizing form; mild; 0.65% activity; dbSNP:rs574370139). VAR_001297 dbSNP
 356R -> W (in AH3; salt wasting form; dbSNP:rs7769409). VAR_001298 dbSNP
 362A -> V (in AH3; no activity). VAR_007924
 363L -> W (in AH3). VAR_026074
 365H -> Y (in AH3; dbSNP:rs1330554738). VAR_026075 dbSNP
 369R -> W (in AH3; dbSNP:rs781074931). VAR_065678 dbSNP
 375G -> S (in hyperandrogenism; due to 21- hydroxylase deficiency; almost completely abolished enzyme activity; dbSNP:rs151344506). VAR_026076 dbSNP
 380E -> D (in AH3; salt wasting form; dbSNP:rs72552756). VAR_001299 dbSNP
 408R -> C (in AH3; very low residual activity; dbSNP:rs72552757). VAR_026077 dbSNP
 424G -> S (in AH3; very low activity; dbSNP:rs72552758). VAR_026078 dbSNP
 426R -> C (in AH3; loss of enzymatic activity toward 17-hydroxyprogesterone and progesterone; dbSNP:rs1370167869). VAR_075378 dbSNP
 426R -> H (in AH3; loss of enzymatic activity toward 17-hydroxyprogesterone; dbSNP:rs151344504). VAR_026079 dbSNP
 435R -> C (in AH3; dbSNP:rs767333157). VAR_026080 dbSNP
 450T -> M (decreased steroid 21- monooxygenase activity; dbSNP:rs1319651744). VAR_077588 dbSNP
 450T -> P (in AH3; salt wasting form; loss of steroid 21-monooxygenase activity). VAR_077589
 453P -> S (in AH3; non-classic form; simple virilizing form when associated with L- 62; 50% of activity; almost completely abolished enzyme activity when associated with S-375; dbSNP:rs6445). VAR_001300 dbSNP
 479R -> L (in AH3; dbSNP:rs184649564). VAR_026081 dbSNP
 482P -> S (in AH3; reduced enzyme activity to 70% of normal; dbSNP:rs776989258). VAR_026082 dbSNP
 483R -> P (in AH3; moderate; 1-2% of activity; dbSNP:rs200005406). VAR_001301 dbSNP
 483R -> Q (in AH3; dbSNP:rs200005406). VAR_018368 dbSNP
 483R -> W (in AH3; salt wasting form; dbSNP:rs759736443). VAR_026083 dbSNP
 493N -> S (in allele CYP21A2*6; dbSNP:rs6473). VAR_001302 dbSNP
 389-391Missing (in AH3; salt wasting form; loss of steroid 21-monooxygenase activity). VAR_077587
 48-478Cytochrome P450
IPR001128PF00067

Sequence Alignments

Experimental structures

DescriptionOligo-stateLigandsStructureRangeDownloadAssess
Crystal Structure of Human Cytochrome P450 21A2 Progesterone Complexmonomer HEM;SO4;STR;4y8w29-484

Homology models built on isoform sequence

Isoform #Oligo-stateLigandsQMEANTemplateRangeSeq id (%)ReportDownloadAssess
2monomer3QZ;-1.345vbu.1.A30-455
99.77