UniProtKB/SwissProt variant VAR

Variant information

Variant position:

227

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 Glutamine (Q) to Histidine (H) at position 227 (Q227H, p.Gln227His).

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 polar.

The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:

0

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 pituitary adenomas; also found in a patient with severe Cushing syndrome.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs137854533 [ dbSNP | Ensembl ]

Sequence information

Variant position:

227

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

Protein sequence length:

394

The length of the canonical sequence.

Location on the sequence:

IFETKFQVDKVNFHMFDVGG Q RDERRKWIQCFNDVTAIIFV

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                         IFETKFQVDKVNFHMFDVGGQRDERRKWIQCFNDVTAIIFV

Mouse                         IFETKFQVDKVNFHMFDVGGQRDERRKWIQCFNDVTAIIFV

Rat                           IFETKFQVDKVNFHMFDVGGQRDERRKWIQCFNDVTAIIFV

Bovine                        IFETKFQVDKVNFHMFDVGGQRDERRKWIQCFNDVTAIIFV

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	2 – 394	Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
Domain	39 – 394	G-alpha
Nucleotide binding	223 – 227	GTP
Region	219 – 228	G3 motif
Mutagenesis	227 – 227	Q -> L. Increases binding to GAS2L2; when associated with N-295.
Beta strand	225 – 227

Literature citations

G-protein mutations in human pituitary adrenocorticotrophic hormone-secreting adenomas.
Williamson E.A.; Ince P.G.; Harrison D.; Kendall-Taylor P.; Harris P.E.;
Eur. J. Clin. Invest. 25:128-131(1995)
Cited for: VARIANT PITUITARY ADENOMA HIS-227;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P63092: Variant p.Gln227His