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UniProtKB/Swiss-Prot Q8TAB3: Variant p.Asn340Ser

Gene: PCDH19
Variant information

Variant position:  340
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 Asparagine (N) to Serine (S) at position 340 (N340S, p.Asn340Ser).
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 (N) to small size and polar (S)
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

Involvement in disease:  Epileptic encephalopathy, early infantile, 9 (EIEE9) [MIM:300088]: A condition characterized by seizure with onset in infancy or early childhood, cognitive impairment, and delayed development of variable severity in some patients. Additional features include autistic signs and psychosis. The disorder is sex-limited, with the phenotype being restricted to females. {ECO:0000269|PubMed:18469813, ECO:0000269|PubMed:19214208, ECO:0000269|PubMed:19752159, ECO:0000269|PubMed:20713952, ECO:0000269|PubMed:20830798, ECO:0000269|PubMed:21053371, ECO:0000269|PubMed:21480887, ECO:0000269|PubMed:21519002, ECO:0000269|PubMed:22050978, ECO:0000269|PubMed:22267240, ECO:0000269|PubMed:25818041, ECO:0000269|PubMed:26993267}. 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 EIEE9; disease features overlapping with Dravet syndrome.
Any additional useful information about the variant.

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

Sequence information

Variant position:  340
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1148
The length of the canonical sequence.

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.



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.

Chain 22 – 1148 Protocadherin-19
Topological domain 22 – 678 Extracellular
Domain 239 – 346 Cadherin 3

Literature citations

Sporadic infantile epileptic encephalopathy caused by mutations in PCDH19 resembles Dravet syndrome but mainly affects females.
Depienne C.; Bouteiller D.; Keren B.; Cheuret E.; Poirier K.; Trouillard O.; Benyahia B.; Quelin C.; Carpentier W.; Julia S.; Afenjar A.; Gautier A.; Rivier F.; Meyer S.; Berquin P.; Helias M.; Py I.; Rivera S.; Bahi-Buisson N.; Gourfinkel-An I.; Cazeneuve C.; Ruberg M.; Brice A.; Nabbout R.; Leguern E.;
PLoS Genet. 5:E1000381-E1000381(2009)
Cited for: VARIANTS EIEE9 ASN-121; GLN-199; SER-340 AND PRO-543; VARIANT GLY-1107;

Protocadherin 19 mutations in girls with infantile-onset epilepsy.
Marini C.; Mei D.; Parmeggiani L.; Norci V.; Calado E.; Ferrari A.; Moreira A.; Pisano T.; Specchio N.; Vigevano F.; Battaglia D.; Guerrini R.;
Neurology 75:646-653(2010)
Cited for: VARIANTS EIEE9 PRO-203; CYS-206; SER-340; HIS-377; ILE-404 AND GLN-414;

Spectrum of phenotypes in female patients with epilepsy due to protocadherin 19 mutations.
Specchio N.; Marini C.; Terracciano A.; Mei D.; Trivisano M.; Sicca F.; Fusco L.; Cusmai R.; Darra F.; Bernardina B.D.; Bertini E.; Guerrini R.; Vigevano F.;
Epilepsia 52:1251-1257(2011)
Cited for: VARIANTS EIEE9 SER-236; SER-340; PRO-433 AND ARG-513;

Recurrence risk of epilepsy and mental retardation in females due to parental mosaicism of PCDH19 mutations.
Dibbens L.M.; Kneen R.; Bayly M.A.; Heron S.E.; Arsov T.; Damiano J.A.; Desai T.; Gibbs J.; McKenzie F.; Mulley J.C.; Ronan A.; Scheffer I.E.;
Neurology 76:1514-1519(2011)
Cited for: VARIANTS EIEE9 PRO-25 AND SER-340;

PCDH19 mutation in Japanese females with epilepsy.
Higurashi N.; Shi X.; Yasumoto S.; Oguni H.; Sakauchi M.; Itomi K.; Miyamoto A.; Shiraishi H.; Kato T.; Makita Y.; Hirose S.;
Epilepsy Res. 99:28-37(2012)
Cited for: VARIANTS EIEE9 GLY-72; LEU-191 AND SER-340; VARIANTS HIS-1107 AND HIS-1134;

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.