UniProtKB/SwissProt variant VAR

Variant information

Variant position:

66

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

Type of variant:

US

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 66 (I66T, p.Ile66Thr).

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 MMRCS4; unknown pathological significance; normal DNA mismatch repair activity.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs769554577 [ dbSNP | Ensembl ]

Sequence information

Variant position:

66

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

Protein sequence length:

862

The length of the canonical sequence.

Location on the sequence:

SLDAGATNIDLKLKDYGVDL I EVSDNGCGVEEENFEGLTLK

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                         SLDAGATNIDLKLKDYGVDLIEVSDNGCGVEEENFEGLTLK

Mouse                         SVDAGATTIDLRLKDYGVDLIEVSDNGCGVEEENFEGLALK

Chicken                       SLDAGATNIDVRLKDHGAELIEVSDNGGGVEEENFEGLTLK

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 – 862	Mismatch repair endonuclease PMS2
Mutagenesis	70 – 70	D -> N. No effect on protein abundance, no effect on subcellular localization and loss of DNA mismatch repair activity.
Beta strand	64 – 70

Literature citations

Comprehensive mutation analysis of PMS2 in a large cohort of probands suspected of lynch syndrome or constitutional mismatch repair deficiency syndrome.
van der Klift H.M.; Mensenkamp A.R.; Drost M.; Bik E.C.; Vos Y.J.; Gille H.J.; Redeker B.E.; Tiersma Y.; Zonneveld J.B.; Garcia E.G.; Letteboer T.G.; Olderode-Berends M.J.; van Hest L.P.; van Os T.A.; Verhoef S.; Wagner A.; van Asperen C.J.; Ten Broeke S.W.; Hes F.J.; de Wind N.; Nielsen M.; Devilee P.; Ligtenberg M.J.; Wijnen J.T.; Tops C.M.;
Hum. Mutat. 37:1162-1179(2016)
Cited for: VARIANTS MMRCS4 ILE-46; THR-66; TRP-107; GLY-115; PRO-205; VAL-263; LYS-307; SER-437; GLN-479; VAL-488; GLN-504; ILE-585 AND LEU-815; CHARACTERIZATION OF VARIANTS MMRCS4 ILE-46; THR-66; TRP-107; GLY-115; LYS-307; SER-437; VAL-488; GLN-504 AND LEU-815; VARIANTS VAL-18; GLU-60; SER-470; LEU-563; ILE-571 AND SER-775; CHARACTERIZATION OF VARIANTS SER-470 AND SER-775;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P54278: Variant p.Ile66Thr