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UniProtKB/Swiss-Prot P43034: Variant p.His277Pro

Platelet-activating factor acetylhydrolase IB subunit alpha
Gene: PAFAH1B1
Variant information

Variant position:  277
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Histidine (H) to Proline (P) at position 277 (H277P, p.His277Pro).
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 polar (H) to medium size and hydrophobic (P)
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

Involvement in disease:  Lissencephaly 1 (LIS1) [MIM:607432]: A classical lissencephaly. It is characterized by agyria or pachygyria and disorganization of the clear neuronal lamination of normal six-layered cortex. The cortex is abnormally thick and poorly organized with 4 primitive layers. Associated with enlarged and dysmorphic ventricles and often hypoplasia of the corpus callosum. {ECO:0000269|PubMed:11163258, ECO:0000269|PubMed:11502906, ECO:0000269|PubMed:15007136, ECO:0000269|PubMed:15173193, ECO:0000269|PubMed:9063735}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In LIS1.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  277
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  410
The length of the canonical sequence.

Location on the sequence:   TVRVWVVATKECKAELREHE  H VVECISWAPESSYSSISEAT
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                         TVRVWVVATKECKAELREHEHVVECISW-------APESSYSSISEAT

Chimpanzee                    TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Mouse                         TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Rat                           TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Pig                           TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Bovine                        TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Cat                           TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Chicken                       TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Xenopus laevis                TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Xenopus tropicalis            TVRVWVVATKECKAELREHEHVVECISW-------APESSY

Caenorhabditis elegans        TVTVWSFATKSAKLVLRDHEHAVECVEW-------APDTAY

Drosophila                    TIRVWLTNSKDCKVELRDHEHTVECIAW-------APEAAA

Slime mold                    TIKTWNIVKGECLATYREHSHVVECLAFSTANIIDIPGSLL

Baker's yeast                 TLRLTHWPSGNGLSVGTGHEFPIEKVKF-IHFIEDSPEIRF

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.

TypePositionsDescription
Chain 1 – 410 Platelet-activating factor acetylhydrolase IB subunit alpha
Repeat 274 – 333 WD 5
Region 83 – 410 Interaction with dynein and dynactin
Alternative sequence 238 – 410 Missing. In isoform 2.


Literature citations

Mutation screening in a cohort of patients with lissencephaly and subcortical band heterotopia.
Torres F.R.; Montenegro M.A.; Marques-de-Faria A.P.; Guerreiro M.M.; Cendes F.; Lopes-Cendes I.;
Neurology 62:799-802(2004)
Cited for: VARIANT LIS1 PRO-277;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.