UniProtKB/Swiss-Prot P02812: Variant p.Pro274Ser

• Variant information
• Sequence information
• Literature citations
• All

Variant information

Variant position: 274 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 Proline (P) to Serine (S) at position 274 (P274S, p.Pro274Ser). 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 (P) to small size and polar (S) 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
Polymorphism: The number of repeats is polymorphic and varies among different alleles (PubMed:2851479). Additional information on the polymorphism described.
Other resources: Links to websites of interest for the variant.

• Variant rs10845349 [ dbSNP | Ensembl ]

Sequence information

Variant position: 274 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: 416 The length of the canonical sequence.
Location on the sequence: QGPPPPPGKPQGPPPQGGNK P QGPPPPGKPQGPPPQGGSKS 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	17 – 416	Basic salivary proline-rich protein 2
Repeat	259 – 278	11
Region	19 – 416	Disordered
Region	53 – 360	15 X 20 AA approximate tandem repeats of P-P-G-K-P-Q-G-P-P-P-Q-G-[GD]-[NKS]-[KSQ]-[PRS]-[QRS] [GPS]-[PSAR]-[PSR]
Compositional bias	239 – 287	Pro residues
Glycosylation	272 – 272	N-linked (GlcNAc...) asparagine

Literature citations

PRB1, PRB2, and PRB4 coded polymorphisms among human salivary concanavalin-A binding, II-1, and Po proline-rich proteins.
Azen E.A.; Amberger E.; Fisher S.; Prakobphol A.; Niece R.L.;
Am. J. Hum. Genet. 58:143-153(1996)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 35-416; PROTEIN SEQUENCE OF 175-235; GLYCOSYLATION; VARIANT SER-274; Differential RNA splicing and post-translational cleavages in the human salivary proline-rich protein gene system.
Maeda N.; Kim H.-S.; Azen E.A.; Smithies O.;
J. Biol. Chem. 260:11123-11130(1985)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 166-416; VARIANT SER-274;