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UniProtKB/Swiss-Prot Q5K651: Variant p.Lys1495Glu

Sterile alpha motif domain-containing protein 9
Gene: SAMD9
Variant information

Variant position:  1495
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 Lysine (K) to Glutamate (E) at position 1495 (K1495E, p.Lys1495Glu).
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 (K) to medium size and acidic (E)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  1
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:  Tumoral calcinosis, normophosphatemic, familial (NFTC) [MIM:610455]: An uncommon, life-threatening disorder characterized by progressive deposition of calcified masses in cutaneous and subcutaneous tissues. Serum phosphate levels are normal. Clinical features include painful calcified ulcerative lesions and massive calcium deposition in the mid- and lower dermis, severe skin and bone infections, erythematous papular skin eruption in infancy, conjunctivitis, and gingivitis. NFTC shows a striking resemblance to acquired dystrophic calcinosis, in which tissue calcification occurs as a consequence of tissue injury/inflammation. {ECO:0000269|PubMed:16960814, ECO:0000269|PubMed:18094730}. 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 NFTC; loss of cytoplasmic expression.
Any additional useful information about the variant.

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



Sequence information

Variant position:  1495
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1589
The length of the canonical sequence.

Location on the sequence:   KQPIAYFFLGKGKRLERLVH  K GKIDQCFKKTPDINSLWQSG
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.

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 1 – 1589 Sterile alpha motif domain-containing protein 9


Literature citations

Normophosphatemic familial tumoral calcinosis is caused by deleterious mutations in SAMD9, encoding a TNF-alpha responsive protein.
Chefetz I.; Ben Amitai D.; Browning S.; Skorecki K.; Adir N.; Thomas M.G.; Kogleck L.; Topaz O.; Indelman M.; Uitto J.; Richard G.; Bradman N.; Sprecher E.;
J. Invest. Dermatol. 128:1423-1429(2008)
Cited for: FUNCTION; INDUCTION; VARIANT NFTC GLU-1495;

A deleterious mutation in SAMD9 causes normophosphatemic familial tumoral calcinosis.
Topaz O.; Indelman M.; Chefetz I.; Geiger D.; Metzker A.; Altschuler Y.; Choder M.; Bercovich D.; Uitto J.; Bergman R.; Richard G.; Sprecher E.;
Am. J. Hum. Genet. 79:759-764(2006)
Cited for: FUNCTION; TISSUE SPECIFICITY; SUBCELLULAR LOCATION; VARIANT NFTC GLU-1495; CHARACTERIZATION OF VARIANT NFTC GLU-1495;

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.