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UniProtKB/Swiss-Prot Q13144: Variant p.Glu650Lys

Translation initiation factor eIF-2B subunit epsilon
Gene: EIF2B5
Variant information

Variant position:  650
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
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 Glutamate (E) to Lysine (K) at position 650 (E650K, p.Glu650Lys).
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 acidic (E) to large size and basic (K)
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 VWM.
Any additional useful information about the variant.

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



Sequence information

Variant position:  650
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  721
The length of the canonical sequence.

Location on the sequence:   PVFRNYIKRAADHLEALAAI  E DFFLEHEALGISMAKVLMAF
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                         PVFRNYIKRAADHLEALAAIEDFFLEH--EALGISMAKVLMAF

Mouse                         PVLRNYIKRAADHLEALAAIEDFFLEH--ETLVTSMAKVLM

Rat                           PVFRNYIKRAADHLEALAAIEDFFLEH--ETLVPSLAKVLM

Rabbit                        PVFRNYIKRAADHLEALAAIEEFFLEH--EALGTCIAKVLM

Slime mold                    PLLVKFS-SEDSMVDLIFKIQDFCDEN--EKFKVVFQPILH

Baker's yeast                 LLFKRQAFDEEEYIDLMNIIMEKIVEQSFDKPDLILFSALV

Fission yeast                 PLLAKLTFSHEEQVDNVLTLQKYCVRL---SMTRHFLQLLG

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 2 – 721 Translation initiation factor eIF-2B subunit epsilon
Domain 543 – 720 W2
Helix 639 – 655


Literature citations

Subunits of the translation initiation factor eIF2B are mutant in leukoencephalopathy with vanishing white matter.
Leegwater P.A.J.; Vermeulen G.; Koenst A.A.M.; Naidu S.; Mulders J.; Visser A.; Kersbergen P.; Mobach D.; Fonds D.; van Berkel C.G.M.; Lemmers R.J.L.F.; Frants R.R.; Oudejans C.B.M.; Schutgens R.B.H.; Pronk J.C.; van der Knaap M.S.;
Nat. Genet. 29:383-388(2001)
Cited for: VARIANTS VWM GLY-73; ALA-91; PHE-106; HIS-113; HIS-299; GLY-315; HIS-315; PRO-339; GLN-339; TRP-339; VAL-386; ALA-430; ARG-628 AND LYS-650; VARIANT VAL-587;

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.