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UniProtKB/Swiss-Prot Q9NQX3: Variant p.Gly375Asp

Gephyrin
Gene: GPHN
Variant information

Variant position:  375
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 Glycine (G) to Aspartate (D) at position 375 (G375D, p.Gly375Asp).
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 glycine (G) to medium size and acidic (D)
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 MOCODC; patient phenotype resembling Dravet syndrome; abolishes postsynaptic clustering of GPHN; decreases cell-surface expression of GABA receptors; impairs postsynaptic currents; catalytically inactive; decreases binding affinity toward GABRA3; decreases binding affinity toward GLRB.
Any additional useful information about the variant.



Sequence information

Variant position:  375
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  736
The length of the canonical sequence.

Location on the sequence:   LAQDVYAKDNLPPFPASVKD  G YAVRAADGPGDRFIIGESQA
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                         LAQDVYAKDNLPPFPASVKDGYAVRAADGPGDRFIIGESQA

Mouse                         LAQDVYAKDNLPPFPASVKDGYAVRAADGPGDRFIIGESQA

Rat                           LAQDVYAKDNLPPFPASVKDGYAVRAADGPGDRFIIGESQA

Chicken                       LAQDVYAKDNLPPFPASVKDGYAVRAADGPGDRFIIGESQA

Slime mold                    LGEDISSVEPFPNFRASIKDGYAIRSKDGIGKYRLLGDSVA

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 – 736 Gephyrin
Region 326 – 736 MPT adenylyltransferase


Literature citations

Simultaneous impairment of neuronal and metabolic function of mutated gephyrin in a patient with epileptic encephalopathy.
Dejanovic B.; Djemie T.; Gruenewald N.; Suls A.; Kress V.; Hetsch F.; Craiu D.; Zemel M.; Gormley P.; Lal D.; Myers C.T.; Mefford H.C.; Palotie A.; Helbig I.; Meier J.C.; De Jonghe P.; Weckhuysen S.; Schwarz G.;
EMBO Mol. Med. 7:1580-1594(2015)
Cited for: VARIANT MOCODC ASP-375; CHARACTERIZATION OF MOCODC VARIANTS ASP-375 AND ALA-580; INTERACTION WITH GABRA3 AND GLRB; SUBCELLULAR LOCATION; SUBUNIT; FUNCTION; CATALYTIC ACTIVITY; PATHWAY;

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.