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Center for Computational Systems Medicine
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Protein Summary

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AS Summary

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Protein Functional Features

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Gene Isoform Structures and Expression Levels

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Protein Structures

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pLDDT Score Distribution

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Ramachandran Plot of Protein Structures

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Potential Active Site Information

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Protein Structure and Feature Comparision

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Protein-Protein Interaction

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Related Drugs

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Related Diseases

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Clinically Important Variants

Protein:CYP21A2

Protein Summary

check button Gene summary
Gene name: CYP21A2
ASpdb.0 ID: 1589
Gene
Gene symbol

CYP21A2

Gene ID

1589

Gene namecytochrome P450 family 21 subfamily A member 2
SynonymsCA21H|CAH1|CPS1|CYP21|CYP21B|P450c21B
Cytomap

6p21.33

Type of geneprotein-coding
Descriptionsteroid 21-hydroxylase21-OHasecytochrome P450 XXIcytochrome P450, family 21, subfamily A, polypeptide 2cytochrome P450, subfamily XXIA (steroid 21-hydroxylase, congenital adrenal hyperplasia), polypeptide 2cytochrome P450-C21Bsteroid 21 hydroxylase
Modification date20240407
UniProtAcc

P08686


check button Gene ontology of this gene with evidence of Inferred from Direct Assay (IDA) from Entrez
PartnerGeneGO IDGO termPubMed ID
GeneCYP21A2

GO:0006694

steroid biosynthetic process

25855791

GeneCYP21A2

GO:0020037

heme binding

25855791

GeneCYP21A2

GO:0103069

17-hydroxyprogesterone 21-hydroxylase activity

25855791

GeneCYP21A2

GO:0106309

progesterone 21-hydroxylase activity

25855791



AS Summary

check button Information of the canonical protein with experimentally identified structure from PDB (2023).
UniProt AccFile namePDB IDMethodResolutionChainStartEnd
P08686-1P08686-1_4y8w_A.pdb4Y8WX-ray2.64A29484

check button ASpdb's canonical and alternatively spliced isoform information.
accession_idgene_namecanonical_idalternative_idcanonical_lengthalternative_lengthcanonical_startcanonical_endtypeoriginalSEQvariationSEQalternative_startalternative_end
P08686CYP21A2P08686-1P08686-249446566SubstitutionLLL67
P08686CYP21A2P08686-1P08686-249446568102SubstitutionVVVLNSKRTIEEAMVKKWADFAGRPEPLTYKLVSKKLVSR6973

check buttonMultiple sequence alignment of our canonical and alternatively spliced CYP21A2

check button Matched gene isoform IDs with Ensembl and RefSeq of our canonical and alternative spliced genes of CYP21A2
UniProt-idENSGENSTENSP
P08686-1ENSG00000235134.7ENST00000436607.6ENSP00000403721.2
P08686-1ENSG00000198457.13ENST00000448314.6ENSP00000398594.2

UniProt-idNM IDNP ID

check buttonAmino acid sequences of our canonical and alternatively spliced CYP21A2
accession_idProtein sequence
P08686-1MLLLGLLLLPLLAGARLLWNWWKLRSLHLPPLAPGFLHLLQPDLPIYLLGLTQKFGPIYRLHLGLQDVVVLNSKRTIEEAMVKKWADFAG
RPEPLTYKLVSKNYPDLSLGDYSLLWKAHKKLTRSALLLGIRDSMEPVVEQLTQEFCERMRAQPGTPVAIEEEFSLLTCSIICYLTFGDK
IKDDNLMPAYYKCIQEVLKTWSHWSIQIVDVIPFLRFFPNPGLRRLKQAIEKRDHIVEMQLRQHKESLVAGQWRDMMDYMLQGVAQPSME
EGSGQLLEGHVHMAAVDLLIGGTETTANTLSWAVVFLLHHPEIQQRLQEELDHELGPGASSSRVPYKDRARLPLLNATIAEVLRLRPVVP
LALPHRTTRPSSISGYDIPEGTVIIPNLQGAHLDETVWERPHEFWPDRFLEPGKNSRALAFGCGARVCLGEPLARLELFVVLTRLLQAFT
P08686-2MLLLGLLLLLPLLAGARLLWNWWKLRSLHLPPLAPGFLHLLQPDLPIYLLGLTQKFGPIYRLHLGLQDKLVSRNYPDLSLGDYSLLWKAH
KKLTRSALLLGIRDSMEPVVEQLTQEFCERMRAQPGTPVAIEEEFSLLTCSIICYLTFGDKIKDDNLMPAYYKCIQEVLKTWSHWSIQIV
DVIPFLRFFPNPGLRRLKQAIEKRDHIVEMQLRQHKESLVAGQWRDMMDYMLQGVAQPSMEEGSGQLLEGHVHMAAVDLLIGGTETTANT
LSWAVVFLLHHPEIQQRLQEELDHELGPGASSSRVPYKDRARLPLLNATIAEVLRLRPVVPLALPHRTTRPSSISGYDIPEGTVIIPNLQ
GAHLDETVWERPHEFWPDRFLEPGKNSRALAFGCGARVCLGEPLARLELFVVLTRLLQAFTLLPSGDALPSLQPLPHCSVILKMQPFQVR

Protein Functional Features

check buttonMain function of this protein. (from UniProt)
CYP21A2 (go to UniProt):P08686

check buttonRetention analysis result of protein across 39 protein features of UniProt such as six molecule processing features, 13 region features, four site features, six amino acid modification features, two natural variation features, five experimental info features, and 3 secondary structure features. Here, because of limited space for viewing, we only show the protein feature retention information belong to the 13 regional features. All retention annotation result can be downloaded at

download page

* Minus value of BPloci means that the break pointn is located before the CDS.
- Retained protein feature among the 13 regional features.
Accession_idSubsectionStartEndFuncitonal featureSplicing information


Gene Isoform Structures and Expression Levels for CYP21A2

check buttonGene structures of our canonical and alternative spliced genes of CYP21A2
* Click on the image to open the UCSC genome browser with custom track showing this image in a new window.
gene isoform structure of CYP21A2

check button Expression levels of gene isoforms across GTEx.
gtex expression

check button Expression levels of gene isoforms across TCGA.
tcga expression


Protein Structures

check button PDB and CIF files of the predicted protein structures
* Here we show the 3D structure of the proteins using Mol*. AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Model confidence is shown from the pLDDT values per residue. pLDDT corresponds to the model’s prediction of its score on the local Distance Difference Test. It is a measure of local accuracy (from AlphfaFold website). To color code individual residues, we transformed individual PDB files into CIF format.
3D view using mol* of P08686-1
3D view using mol* of P08686-2


pLDDT Score Distribution

check button pLDDT score distribution of the predicted protein structures from AlphaFold2
* AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100.
pLDDT distribution across the protein length of P08686-1
all structure
pLDDT distribution across the protein length of P08686-2
all structure


Ramachandran Plot of Protein Structures


check button Ramachandran plot of the torsional angles - phi (φ)and psi (ψ) - of the residues (amino acids) contained in this protein peptide.
Ramachandran plot of P08686-1
all structure
Ramachandran plot of P08686-2
all structure

Potential Active Site Information


check button The potential binding sites of these proteins were identified using SiteMap, a module of the Schrodinger suite.
UniProt-idSite scoreSizeD scoreVolumeExposureEnclosureContactPhobicPhilicBalanceDon/AccResidues
P08686-11.1722791.187506.9540.320.931.2351.7250.9541.8070.79977,81,91,100,106,107,108,109,116,120,123,127,172,1
97,198,201,226,233,283,286,287,288,290,291,292,294
,295,296,299,353,357,358,359,362,363,365,386,388,4
19,420,421,422,423,426,427,428,429,430,433,434,437
,438,469,470
P08686-21.0722571.112868.4760.530.7520.990.9080.8561.0612.00538,40,41,42,43,44,45,46,64,80,130,132,133,136,162,
166,169,170,171,172,173,174,175,176,178,179,181,18
2,183,192,193,196,265,268,269,272,330,331,332,333,
334,335,356,434,435,436,437,438,439,440,442,443,44
4,446,447

Protein Structure and Feature Comparision


check button Protein Structure Comparision Using Template Modeling Scores (TM-score).
all structure

check button Protein Structure Comparision Visualization with mol*. between Canonical predicted structure (AF2)(orange) vs Canonical validated structure (PDB)(green)
3D view using mol* of P08686-1_P08686-1_4y8w_A.pdb

check button Protein Structure Comparision Visualization with mol*. between Canonical validated structure (PDB)(orange) vs Alternative predicted structure (AF2)(green)
3D view using mol* of P08686-1_4y8w_A_P08686-2.pdb

check button Protein Structure Comparision Visualization with mol*. between Canonical predicted structure (AF2)(orange) vs Alternative predicted structure (AF2)(green)
3D view using mol* of P08686-1_P08686-2.pdb

check button Protein Feature Comparison of the protein sequendary structures among the protiens.
./stats/secondary_structure/figure/P08686-1_vs_P08686-2.png
all structure<

check button Protein Feature Comparison of the relative accessible surface area (ASA) among the protiens.
./stats/relative_asa/P08686-1_vs_P08686-2.png
all structure<


Protein-Protein Interaction


check button Interactors from UniProt.
Accession_idSubsectionStartEndFuncitonal featureSplicing information


check button Interactors from STRING.
Gene nameInteractors


Related Drugs to CYP21A2


check button Drugs targeting this gene/protein.
(DrugBank)
UniProt accessionGene nameDrugBank IDDrug nameDrug groupActions
P08686CYP21A2DB01026Ketoconazoleapproved, investigationalinhibitor

Related Diseases to CYP21A2


check button Previous studies relating to the alternative splicing of CYP21A2 and disease information from the MeSH term (PubMed)
GenePMIDTitleAbstractMeSH IDMeSH term


Clinically important variants in CYP21A2


check button (ClinVar, 04/20/2024)
accession_iduniprot_idgene_nameTypeVariantClinical_significance