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UniProtKB/Swiss-Prot O95831: Variant p.Val498Met

Apoptosis-inducing factor 1, mitochondrial
Gene: AIFM1
Variant information

Variant position:  498
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 Valine (V) to Methionine (M) at position 498 (V498M, p.Val498Met).
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 hydrophobic.
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 DFNX5; unknown pathological significance.
Any additional useful information about the variant.

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



Sequence information

Variant position:  498
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  613
The length of the canonical sequence.

Location on the sequence:   HQSMFWSDLGPDVGYEAIGL  V DSSLPTVGVFAKATAQDNPK
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                         HQSMFWSDLGPDVGYEAIGLVDSSLPTVGVFAKATAQDNP-K

Mouse                         HQSMFWSDLGPDVGYEAIGLVDSSLPTVGVFAKATAQDNP-

Rat                           HQSMFWSDLGPDVGYEAIGLVDSSLPTVGVFAKATAQDNP-

Drosophila                    HQSMFWSDLGPEIGYEGIGLVDSSLPTVGVFALPSESATRV

Slime mold                    YQPFFWSDLTPGVGFEAVGNTSSKLKTFSVWEKPSSDETK-

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 102 – 613 Apoptosis-inducing factor 1, mitochondrial
Binding site 483 – 483 FAD; via carbonyl oxygen
Binding site 483 – 483 NAD 1; via carbonyl oxygen
Binding site 493 – 493 NAD 2
Alternative sequence 44 – 613 Missing. In isoform 6.
Alternative sequence 325 – 613 Missing. In isoform 4.
Mutagenesis 480 – 480 S -> A. Allows dimerization in absence of NADH.
Mutagenesis 485 – 485 D -> A. Increases protein dimerization at lower NADH levels.


Literature citations

Mutations in apoptosis-inducing factor cause X-linked recessive auditory neuropathy spectrum disorder.
Zong L.; Guan J.; Ealy M.; Zhang Q.; Wang D.; Wang H.; Zhao Y.; Shen Z.; Campbell C.A.; Wang F.; Yang J.; Sun W.; Lan L.; Ding D.; Xie L.; Qi Y.; Lou X.; Huang X.; Shi Q.; Chang S.; Xiong W.; Yin Z.; Yu N.; Zhao H.; Wang J.; Wang J.; Salvi R.J.; Petit C.; Smith R.J.; Wang Q.;
J. Med. Genet. 52:523-531(2015)
Cited for: INVOLVEMENT IN DFNX5; VARIANTS DFNX5 ALA-260; PHE-344; ARG-360; GLN-422; TRP-422; CYS-430; GLN-451; VAL-472; LEU-475; MET-498 AND MET-591;

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.