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UniProtKB/Swiss-Prot P28329: Variant p.Val461Met

Choline O-acetyltransferase
Gene: CHAT
Variant information

Variant position:  461
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 Valine (V) to Methionine (M) at position 461 (V461M, p.Val461Met).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
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

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



Sequence information

Variant position:  461
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  748
The length of the canonical sequence.

Location on the sequence:   EHSPFDGIVLVQCTEHLLKH  V TQSSRKLIRADSVSELPAPR
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                         EHSPFDGIVLVQCTEHLLKHVTQSSRKLIRADSVSELPAPR

Mouse                         EHSPFDGIVLVQCTEHLLKHMMTGNKKLVRVDSVSELPAPR

Rat                           EHSPFDGIVLVQCTEHLLKHMMTSNKKLVRADSVSELPAPR

Pig                           EHSPFDGIVLVQCTEHLLKHMVKSSKKMVRADSVSELPAPR

Chicken                       EHSPFDGIVLVQCTEHLLKHMKESSKKLLRADSVSELPAPR

Zebrafish                     EHSPFEGIVLVQCSEYLLRYMRGSPSKLVRAASMSELPAPR

Caenorhabditis elegans        EHSTAEGIVIINMAETAIRYAQKYFKSKMVWNDVRNVH-PK

Drosophila                    EHSCSEGIAVVQLLEKIYKKIEEHPDEDNGLPQ-HHLPPPE

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 – 748 Choline O-acetyltransferase
Active site 442 – 442 Proton acceptor
Modified residue 473 – 473 Phosphoserine
Helix 447 – 461


Literature citations

A complementary DNA for human choline acetyltransferase induces two forms of enzyme with different molecular weights in cultured cells.
Oda Y.; Nakanishi I.; Deguchi T.;
Brain Res. Mol. Brain Res. 16:287-294(1992)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM M); VARIANTS GLY-392 AND MET-461;

Choline acetyltransferase mutations cause myasthenic syndrome associated with episodic apnea in humans.
Ohno K.; Tsujino A.; Brengman J.M.; Harper C.M.; Bajzer Z.; Udd B.; Beyring R.; Robb S.; Kirkham F.J.; Engel A.G.;
Proc. Natl. Acad. Sci. U.S.A. 98:2017-2022(2001)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA / MRNA] (ISOFORMS M; R AND S); ALTERNATIVE SPLICING; VARIANTS CMS6 PRO-210; ALA-211; THR-305; CYS-420; LYS-441; GLY-482; LEU-498; LEU-506 AND HIS-560; VARIANTS THR-120; GLY-392 AND MET-461;

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] (ISOFORM R); NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 108-748 (ISOFORM M); VARIANTS THR-120 AND MET-461;

Two mRNAs are transcribed from the human gene for choline acetyltransferase.
Lorenzi M.V.; Trinidad A.C.; Zhang R.; Strauss W.L.;
DNA Cell Biol. 11:593-603(1992)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 111-669; VARIANTS THR-120 AND MET-461;

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.