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UniProtKB/Swiss-Prot O15528: Variant p.Arg389His

25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial
Gene: CYP27B1
Variant information

Variant position:  389
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Arginine (R) to Histidine (H) at position 389 (R389H, p.Arg389His).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from large size and basic (R) to medium size and polar (H)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  0
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Involvement in disease:  Rickets vitamin D-dependent 1A (VDDR1A) [MIM:264700]: A disorder caused by a selective deficiency of the active form of vitamin D (1,25-dihydroxyvitamin D3) and resulting in defective bone mineralization and clinical features of rickets. {ECO:0000269|PubMed:10320521, ECO:0000269|PubMed:10566658, ECO:0000269|PubMed:12050193, ECO:0000269|PubMed:9486994, ECO:0000269|PubMed:9837822}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In VDDR1A; complete loss of activity.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.

Sequence information

Variant position:  389
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  508
The length of the canonical sequence.

The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.




Literature citations

Genetics of vitamin D 1-alpha-hydroxylase deficiency in 17 families.
Wang J.T.; Lin C.-J.; Burridge S.M.; Fu G.K.; Labuda M.; Portale A.A.; Miller W.L.;
Am. J. Hum. Genet. 63:1694-1702(1998)
Cited for: VARIANTS VDDR1A HIS-65; LYS-189; HIS-389; ILE-409; PRO-429; CYS-453 AND ARG-497;

Novel gene mutations in patients with 1alpha-hydroxylase deficiency that confer partial enzyme activity in vitro.
Wang X.; Zhang M.Y.; Miller W.L.; Portale A.A.;
J. Clin. Endocrinol. Metab. 87:2424-2430(2002)

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.