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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P28329: Variant p.Leu210Pro

Choline O-acetyltransferase
Gene: CHAT
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Variant information Variant position: help 210 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] 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 Leucine (L) to Proline (P) at position 210 (L210P, p.Leu210Pro). 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 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: help -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
Variant description: help In CMS6; impaired activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 210 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 748 The length of the canonical sequence.
Location on the sequence: help TANWVSEYWLNDMYLNNRLA L PVNSSPAVIFARQHFPGTDD 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                         TANWVSEYWLNDMYLNNRLALPVNSSPAVIFARQHFPGTDD

Mouse                         TANWVSEYWLNDMYLNNRLALPVNSSPAVIFARQHFQDTND

Rat                           TANWVSEYWLNDMYLNNRLALPVNSSPAVIFARQHFQDTND

Pig                           TANWVSEYWLNDMYLNNRLALPVNSSPAVIFARQHFQDTND

Chicken                       TTNWVFNYWLDDMYLNNRLALPVNSSPAIIFARQNFKDVND

Zebrafish                     KANWVYDYWLEDMYLNNRLALPVNSSPVMVFHKQNFKGQSD

Caenorhabditis elegans        SPNWATKFWLPEMYMRVRMPTPVNSNPGYIFPKVKFETKED

Drosophila                    EDNWAYYYWLNEMYMDIRIPLPINSNPGMVFPPRRFKTVHD
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 – 748 Choline O-acetyltransferase
Helix 210 – 213



Literature citations
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;
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.