UniProtKB/SwissProt variant VAR

Variant information

Variant position:

305

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

Type of variant:

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:

From Isoleucine (I) to Threonine (T) at position 305 (I305T, p.Ile305Thr).

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 (I) to medium size and polar (T)

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

Variant description:

In CMS6; impaired activity.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs75466054 [ dbSNP | Ensembl ]

Sequence information

Variant position:

305

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:

HTQDTLVAQNSSIMPEPEHV I VACCNQFFVLDVVINFRRLS

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                         HTQDTLV-AQNSSIMPEPEHVIVACCNQFFVLDVVINFR-RLS

Mouse                         HTQDTLV-AQKSSIMPEPEHVIVACCNQFFVLDVVINFR-R

Rat                           HTQDTLV-AQKSSIMPEPEHVIVACCNQFFVLDVVINFR-R

Pig                           HTQDTLV-AQKSSVMPEPEHVIVACCNQFFVLDVVINFR-R

Chicken                       HTKDTLV-AQKSCVMPEPEHIIVACNNQLFVLDVGINFR-R

Zebrafish                     TKTDTLV-AQKSTVMPEPEHIIVACKNQFFVLDVMVNFR-R

Caenorhabditis elegans        VGEDTQI--RKQKTNDGNEHVLVMCRNQTFLLHSRINGA-L

Drosophila                    VKQDSQFLPSRERLNDEDRHVVVICRNQMYCVVLQASDRGK

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 – 748	Choline O-acetyltransferase
Beta strand	300 – 308

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;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P28329: Variant p.Ile305Thr