UniProtKB/Swiss-Prot O15118: Variant p.Val971Gly

Niemann-Pick C1 protein
Gene: NPC1
Chromosomal location: 18q11-q12
Variant information

Variant position:  971
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
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 Valine (V) to Glycine (G) at position 971 (V971G, p.Val971Gly).
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 medium size and hydrophobic (V) to glycine (G)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
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



Sequence information

Variant position:  971
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1278
The length of the canonical sequence.

Location on the sequence:   KPQSSCCRVDNITDQFCNAS  V VDPACVRCRPLTPEGKQRPQ
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.

Human                         KPQS-SCCRVD-NITDQFCN-----ASVVDPACVRCR---------PLTPEGKQRPQ

Mouse                         SPQS-SCCRLY-NVTHQFCN-----ASVMDPTCVRCR----

Pig                           KPQS-SCCRVY-NSTDQFCN-----ASVVDPTCIRCR----

Caenorhabditis elegans        SRKS-PCCKVYVHDPNTFCSTNRNKSALDDKACRTCMDFDY

Baker's yeast                 NPQNDQCCRLK-KGTDEVCP-----PSFPSRRCETCFQQG-

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 23 – 1278 Niemann-Pick C1 protein
Topological domain 854 – 1098 Lumenal
Glycosylation 961 – 961 N-linked (GlcNAc...) asparagine
Glycosylation 968 – 968 N-linked (GlcNAc...) asparagine
Beta strand 969 – 971


Literature citations

NPC1: complete genomic sequence, mutation analysis, and characterization of haplotypes.
Bauer P.; Knoblich R.; Bauer C.; Finckh U.; Hufen A.; Kropp J.; Braun S.; Kustermann-Kuhn B.; Schmidt D.; Harzer K.; Rolfs A.;
Hum. Mutat. 19:30-38(2002)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS NPC1 ARG-512; TRP-670; CYS-825; ILE-849; VAL-874; TYR-948; LEU-954; LEU-958; ALA-1007 AND THR-1061; VARIANTS ARG-215; ILE-642; VAL-858; GLY-971 AND VAL-1049;

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.