UniProtKB/SwissProt variant VAR

Variant information

Variant position:

131

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 Tyrosine (Y) to Histidine (H) at position 131 (Y131H, p.Tyr131His).

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 large size and aromatic (Y) to medium size and polar (H)

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

BLOSUM score:

2

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.

Variant rs45630737 [ dbSNP | Ensembl ]

Sequence information

Variant position:

131

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

Protein sequence length:

611

The length of the canonical sequence.

Location on the sequence:

PKSSALQWLTPEQTSGKEHP Y LFSQCQAIHCRAILPCQDTP

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                         PKSSALQWLTPEQTSGKEHPYLFSQCQAIHCRAILPCQDTP

Mouse                         PKSSALQWLTPEQTSGKQHPYLFSQCQAIHCRAILPCQDTP

Rat                           PKSSALQWLTPEQTSGKQHPYLFSQCQAIHCRAILPCQDTP

Bovine                        PKSSALQWLTPEQTSGKEHPYLFSQCQAIHCRAILPCQDTP

Slime mold                    VDSNALQWLTKDQTAGKLHPYLFSQCQAIHARSLVPCQDSP

Baker's yeast                 DKCTALQWLNSKQTKGGK-PYVFSQLEAIHARSLFPCFDTP

Fission yeast                 KDCTALQFLKPEQTIGGKFPYVFSECQAIHARSFIPCQDTP

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 – 611	Leukotriene A-4 hydrolase
Mutagenesis	135 – 135	Q -> AL. Srongly increased epoxide hydrolase activity.
Mutagenesis	135 – 135	Q -> A. Strongly reduced aminopeptidase activity. Strongly decreased affinity for leukotriene. Abolishes epoxide hydrolase activity.
Mutagenesis	137 – 137	Q -> A. No loss of activity.
Mutagenesis	137 – 137	Q -> L. Aminopeptidase activity strongly impaired, but keeps LTA4 activity.
Mutagenesis	137 – 137	Q -> N. Aminopeptidase activity almost absent, but keeps LTA4 activity.
Mutagenesis	140 – 140	H -> Q. Aminopeptidase activity almost absent, but keeps LTA4 activity.
Beta strand	131 – 134

Literature citations

No reference for the current variant in UniProtKB/Swiss-Prot.

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P09960: Variant p.Tyr131His