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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q8N3J5: Variant p.Asn94Lys

Protein phosphatase Mn(2+)-dependent 1K
Gene: PPM1K
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Variant information Variant position: help 94 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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 Asparagine (N) to Lysine (K) at position 94 (N94K, p.Asn94Lys). 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 medium size and polar (N) to large size and basic (K) 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 No effect on serine/threonine phosphatase activity toward BCKDHA. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 94 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 372 The length of the canonical sequence.
Location on the sequence: help PILLPPSIKYGKPIPKISLE N VGCASQIGKRKENEDRFDFA 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                         PILLPPSIKYGKPIPKISLENVGCASQIGKRKENEDRFDFA

Mouse                         PILLPPSIKYGKPIPKISLENVGCASLIGKRKENEDRFGFA

Bovine                        PILLPPSIKYGKPIPKVSLQNVGSASQIGKRKENEDRFGFA

Xenopus laevis                PIQLPPSIKYGKLIPHINLSKVGCSTQLGKRKENEDRFKLA

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 30 – 372 Protein phosphatase Mn(2+)-dependent 1K
Domain 94 – 346 PPM-type phosphatase
Mutagenesis 104 – 104 R -> A. Decreases the affinity toward BCKDHA by 61-fold. Decreases the catalytic efficiency toward BCKDHA down to 2%.
Mutagenesis 109 – 109 D -> A. Loss of serine/threonine phosphatase activity toward BCKDHA.
Helix 92 – 94



Literature citations
The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).
The MGC Project Team;
Genome Res. 14:2121-2127(2004)
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 3); VARIANT LYS-94; Tissue-specific and nutrient regulation of the branched-chain alpha-keto acid dehydrogenase phosphatase, protein phosphatase 2Cm (PP2Cm).
Zhou M.; Lu G.; Gao C.; Wang Y.; Sun H.;
J. Biol. Chem. 287:23397-23406(2012)
Cited for: FUNCTION; CATALYTIC ACTIVITY; INTERACTION WITH DBT AND BCKDHA; REGION; CHARACTERIZATION OF VARIANTS LYS-94; THR-167 AND LYS-321;
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.