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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P67775: Variant p.Asp223Val

Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform
Gene: PPP2CA
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Variant information Variant position: help 223 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 Aspartate (D) to Valine (V) at position 223 (D223V, p.Asp223Val). 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 acidic (D) to medium size and hydrophobic (V) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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 HJS3; no effect on phosphatase activity in an in vitro assay; no effect on the interaction with PP2A subunit A PPP2R1A/PPP2R1B; no effect on interaction with PP2A subunit B components. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 223 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 309 The length of the canonical sequence.
Location on the sequence: help PDDRGGWGISPRGAGYTFGQ D ISETFNHANGLTLVSRAHQL 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                         PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Mouse                         PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Rat                           PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Pig                           PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Bovine                        PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Rabbit                        PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Chicken                       PDDRGGWGISPRGAGYTFGQDISETFNHANGLTLVSRAHQL

Slime mold                    PDDRLGFGYSPRGAGYTFGKDISEQFNHNNGLTLVARAHQL
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 – 309 Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform
Binding site 241 – 241
Alternative sequence 193 – 246 Missing. In isoform 2.
Helix 222 – 232



Literature citations
De novo mutations affecting the catalytic C alpha subunit of PP2A, PPP2CA, cause syndromic intellectual disability resembling other PP2A-related neurodevelopmental disorders.
Reynhout S.; Jansen S.; Haesen D.; van Belle S.; de Munnik S.A.; Bongers E.M.H.F.; Schieving J.H.; Marcelis C.; Amiel J.; Rio M.; Mclaughlin H.; Ladda R.; Sell S.; Kriek M.; Peeters-Scholte C.M.P.C.D.; Terhal P.A.; van Gassen K.L.; Verbeek N.; Henry S.; Scott Schwoerer J.; Malik S.; Revencu N.; Ferreira C.R.; Macnamara E.; Braakman H.M.H.; Brimble E.; Ruzhnikov M.R.Z.; Wagner M.; Harrer P.; Wieczorek D.; Kuechler A.; Tziperman B.; Barel O.; de Vries B.B.A.; Gordon C.T.; Janssens V.; Vissers L.E.L.M.;
Am. J. Hum. Genet. 104:139-156(2019)
Cited for: INVOLVEMENT IN HJS3; VARIANTS HJS3 VAL-60; GLY-88; HIS-122; 125-GLN--LEU-309 DEL; CYS-127; HIS-131; ARG-191; 214-ARG--LEU-309 DEL; HIS-223; VAL-223; CYS-265; 295-ARG--LEU-309 DEL AND PHE-308 INS; CHARACTERIZATION OF VARIANTS HJS3 GLY-88; HIS-122; 125-GLN--LEU-309 DEL; CYS-127; HIS-131; ARG-191; 214-ARG--LEU-309 DEL; HIS-223; VAL-223; CYS-265; 295-ARG--LEU-309 DEL AND PHE-308 INS; CATALYTIC ACTIVITY; MUTAGENESIS OF ASP-85; CARBOXYMETHYLATION; INTERACTION WITH PP2A SUBUNIT A AND PP2A SUBUNITS B;
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.