UniProtKB/Swiss-Prot Q96T54: Variant p.Ser21Gly

• Variant information
• Sequence information
• Literature citations
• All

Variant information

Variant position: 21 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: LB/B The variants are classified into three categories: LP/P, LB/B and US.

• LP/P: likely pathogenic or pathogenic.
• LB/B: likely benign or benign.
• US: uncertain significance

Residue change: From Serine (S) to Glycine (G) at position 21 (S21G, p.Ser21Gly). 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 small size and polar (S) to glycine (G) 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
Other resources: Links to websites of interest for the variant.

• Variant rs10947804 [ dbSNP | Ensembl ]

Sequence information

Variant position: 21 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: 332 The length of the canonical sequence.
Location on the sequence: MYRPRARAAPEGRVRGCAVP S TVLLLLAYLAYLALGTGVFW 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.

Type	Positions	Description
Chain	1 – 332	Potassium channel subfamily K member 17
Transmembrane	21 – 43	Helical

Literature citations

Characterization of TASK-4, a novel member of the pH-sensitive, two-pore domain potassium channel family.
Decher N.; Maier M.; Dittrich W.; Gassenhuber J.; Brueggemann A.; Busch A.E.; Steinmeyer K.;
FEBS Lett. 492:84-89(2001)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; FUNCTION; TRANSPORTER ACTIVITY; ACTIVITY REGULATION; BIOPHYSICOCHEMICAL PROPERTIES; VARIANT GLY-21; The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).
The MGC Project Team;
Genome Res. 14:2121-2127(2004)
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]; VARIANT GLY-21;