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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O95140: Variant p.Arg280His

Mitofusin-2
Gene: MFN2
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Variant information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Arginine (R) to Histidine (H) at position 280 (R280H, p.Arg280His). 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: help Change from large size and basic (R) to medium size and polar (H) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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: help In CMT2A2A; likely pathogenic. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 757 The length of the canonical sequence.
Location on the sequence: help WDASASEPEYMEEVRRQHME R CTSFLVDELGVVDRSQAGDR 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         WDASASEPEYMEEVRRQHMERCTSFLVDELGVVDRSQAGDR

Mouse                         WDASASEPEYMEEVRRQHMERCTSFLVDELGVVDRAQAGDR

Rat                           WDASASEPEYMEEVRRQHMERCTSFLVDELGVVDRAQAGDR
Sequence annotation in neighborhood: help 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 – 757 Mitofusin-2
Topological domain 1 – 604 Cytoplasmic
Domain 93 – 342 Dynamin-type G
Region 288 – 288 G5 motif
Alternative sequence 1 – 302 Missing. In isoform 2.
Mutagenesis 260 – 260 W -> A. Loss of function in promoting mitochondrial fusion.
Mutagenesis 266 – 266 E -> A. Loss of function in promoting mitochondrial fusion.
Helix 270 – 287



Literature citations
Mutations in the mitochondrial GTPase mitofusin 2 cause Charcot-Marie-Tooth neuropathy type 2A.
Zuechner S.; Mersiyanova I.V.; Muglia M.; Bissar-Tadmouri N.; Rochelle J.; Dadali E.L.; Zappia M.; Nelis E.; Patitucci A.; Senderek J.; Parman Y.; Evgrafov O.; Jonghe P.D.; Takahashi Y.; Tsuji S.; Pericak-Vance M.A.; Quattrone A.; Battaloglu E.; Polyakov A.V.; Timmerman V.; Schroeder J.M.; Vance J.M.;
Nat. Genet. 36:449-451(2004)
Cited for: DISEASE; VARIANTS CMT2A2A PHE-69; PRO-76; GLN-94; ALA-251; HIS-280 AND SER-740; Early onset severe and late-onset mild Charcot-Marie-Tooth disease with mitofusin 2 (MFN2) mutations.
Chung K.W.; Kim S.B.; Park K.D.; Choi K.G.; Lee J.H.; Eun H.W.; Suh J.S.; Hwang J.H.; Kim W.K.; Seo B.C.; Kim S.H.; Son I.H.; Kim S.M.; Sunwoo I.N.; Choi B.O.;
Brain 129:2103-2118(2006)
Cited for: VARIANT HMSN6A TRP-364; VARIANTS CMT2A2A PRO-92; TRP-94; MET-105; ASP-127; ARG-165; PRO-263; HIS-280; MET-362; TRP-364 AND THR-376;
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.