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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O95263: Variant p.His305Pro

High affinity cAMP-specific and IBMX-insensitive 3',5'-cyclic phosphodiesterase 8B
Gene: PDE8B
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Variant information Variant position: help 305 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 Histidine (H) to Proline (P) at position 305 (H305P, p.His305Pro). 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 (H) to medium size and hydrophobic (P) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -2 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 PPNAD3; shows significantly higher cyclic AMP levels after transfection with the mutant protein than after transfection with the wild-type, indicating an impaired ability of the mutant protein to degrade cAMP. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 305 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 885 The length of the canonical sequence.
Location on the sequence: help TSDDHVIQYVNPAFERMMGY H KGELLGKELADLPKSDKNRA 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                         TSDDHVIQYVNPAFERMMGYHKGELLGKELADLPKSDKNRA

Mouse                         TSDDHVIQYVNPAFERMMGYHKGELLGKELADLPKSDKNRA
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 – 885 High affinity cAMP-specific and IBMX-insensitive 3',5'-cyclic phosphodiesterase 8B
Domain 267 – 338 PAS
Alternative sequence 1 – 535 Missing. In isoform 5.
Alternative sequence 293 – 389 Missing. In isoform 2.
Alternative sequence 293 – 339 Missing. In isoform 6.



Literature citations
A cAMP-specific phosphodiesterase (PDE8B) that is mutated in adrenal hyperplasia is expressed widely in human and mouse tissues: a novel PDE8B isoform in human adrenal cortex.
Horvath A.; Giatzakis C.; Tsang K.; Greene E.; Osorio P.; Boikos S.; Libe R.; Patronas Y.; Robinson-White A.; Remmers E.; Bertherat J.; Nesterova M.; Stratakis C.A.;
Eur. J. Hum. Genet. 16:1245-1253(2008)
Cited for: VARIANT PPNAD3 PRO-305; CHARACTERIZATION OF VARIANT PPNAD3 PRO-305;
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.