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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9Y345: Variant p.Phe124Ser

Sodium- and chloride-dependent glycine transporter 2
Gene: SLC6A5
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Variant information Variant position: help 124 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Phenylalanine (F) to Serine (S) at position 124 (F124S, p.Phe124Ser). 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: help Change from large size and aromatic (F) to small size and polar (S) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -2 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: help Links to websites of interest for the variant.


Sequence information Variant position: help 124 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 797 The length of the canonical sequence.
Location on the sequence: help QASPPPGSSGPGNALHCKIP F LRGPEGDANVSVGKGTLERN 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human                         QASPPPGSSGPGNALHCKIPFLRGPEGDANVSVGKGTLERN

Mouse                         QANPPSGPAGAGNALHCKIPALRGPEEDANVSVGKGTLEHN

Rat                           QANPPSGAAGAGNALHCKIPALRGPEEDENVSVGKGTLEHN

Xenopus laevis                KNSSMAESNGQTNPMHCRIVPLQSAEGDTNQGFGKNSLEQN

Sequence annotation in neighborhood: help 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 – 797 Sodium- and chloride-dependent glycine transporter 2
Topological domain 1 – 199 Cytoplasmic
Alternative sequence 1 – 234 Missing. In isoform 2.



Literature citations
Molecular cloning and functional expression of the human glycine transporter GlyT2 and chromosomal localisation of the gene in the human genome.
Morrow J.A.; Collie I.T.; Dunbar D.R.; Walker G.B.; Shahid M.; Hill D.R.;
FEBS Lett. 439:334-340(1998)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; FUNCTION; TRANSPORTER ACTIVITY; BIOPHYSICOCHEMICAL PROPERTIES; TISSUE SPECIFICITY; VARIANTS SER-124 AND GLY-162; Characterization of multiple forms of the human glycine transporter type-2.
Gallagher M.J.; Burgess L.H.; Brunden K.R.;
Brain Res. Mol. Brain Res. 70:101-115(1999)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; ALTERNATIVE SPLICING (ISOFORMS 2 AND 3); FUNCTION; TRANSPORTER ACTIVITY; BIOPHYSICOCHEMICAL PROPERTIES; VARIANTS SER-102; SER-124 AND GLY-162; Cloning, functional characterisation and population analysis of a variant form of the human glycine type 2 transporter.
Evans J.; Herdon H.; Cairns W.; O'Brien E.; Chapman C.; Terrett J.; Gloger I.;
FEBS Lett. 463:301-306(1999)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; FUNCTION; TRANSPORTER ACTIVITY; BIOPHYSICOCHEMICAL PROPERTIES; VARIANTS SER-124; GLY-162; ARG-184; ASN-463 AND ALA-751; CHARACTERIZATION OF VARIANTS ARG-184; ASN-463 AND ALA-751; Cloning and expression of a human glycine transporter type II.
Luyten W.;
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; VARIANTS SER-124 AND GLY-162; 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]; VARIANTS SER-124 AND GLY-162;
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.