UniProtKB/SwissProt variant VAR

Variant information

Variant position:

198

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 Isoleucine (I) to Threonine (T) at position 198 (I198T, p.Ile198Thr).

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:

Associated with asthma and atopy; retains the ability to associate with HDL particles.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs1805018 [ dbSNP | Ensembl ]

Sequence information

Variant position:

198

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

Protein sequence length:

441

The length of the canonical sequence.

Location on the sequence:

EHRDRSASATYYFKDQSAAE I GDKSWLYLRTLKQEEETHIR

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                         EHRDRSASATYYFKDQSAAEIGD-------KSWLYLRTLKQ-EE-ETHIR

                              EHRDGSASATYYFKDQSAAEIGN-------KSWSYLQELKP

Mouse                         EHRDRSASATYFFEDQVAAKVEN-------RSWLYLRKVKQ

Bovine                        EHRDGSASSTYYFKDQSAVEIGN-------KSWLYLRTLKR

Chicken                       EHRDESASATYFCKKKADSEPEEDQTSGVEKEWIYYRKLRA

Caenorhabditis elegans        EHKDHSACWTYQLTEKNGELVEQ---------PIKIKLIEK

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	22 – 441	Platelet-activating factor acetylhydrolase
Mutagenesis	205 – 205	Y -> A. Impairs the association with LDL particles.
Helix	193 – 198

Literature citations

Submission
SeattleSNPs variation discovery resource;
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS PRO-45; HIS-92; ASN-191; THR-198 AND ALA-379;

Identification of a domain that mediates association of platelet-activating factor acetylhydrolase with high density lipoprotein.
Gardner A.A.; Reichert E.C.; Topham M.K.; Stafforini D.M.;
J. Biol. Chem. 283:17099-17106(2008)
Cited for: FUNCTION; CATALYTIC ACTIVITY; SUBCELLULAR LOCATION; MUTAGENESIS OF HIS-367; MET-368; LEU-369 AND LYS-370; VARIANTS HIS-92; THR-198 AND ALA-379;

The Ile198Thr and Ala379Val variants of plasmatic PAF-acetylhydrolase impair catalytical activities and are associated with atopy and asthma.
Kruse S.; Mao X.-Q.; Heinzmann A.; Blattmann S.; Roberts M.H.; Braun S.; Gao P.-S.; Forster J.; Kuehr J.; Hopkin J.M.; Shirakawa T.; Deichmann K.A.;
Am. J. Hum. Genet. 66:1522-1530(2000)
Cited for: VARIANTS HIS-92; THR-198 AND ALA-379; INVOLVEMENT IN ASTHMA AND ATOPY;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q13093: Variant p.Ile198Thr