Protein Family Models

Protein phosphorylation, which plays a key role in most cellular activities, is a reversible process mediated by protein kinases and phosphoprotein phosphatases. Protein kinases catalyse the transfer of the gamma phosphate from nucleotide triphosphates (often ATP) to one or more amino acid residues in a protein substrate side chain, resulting in a conformational change affecting protein function. Phosphoprotein phosphatases catalyse the reverse process. Protein kinases fall into three broad classes, characterised with respect to substrate specificity [1]; Serine/threonine-protein kinases, tyrosine-protein kinases, and dual specificity protein kinases (e.g. MEK - phosphorylates both Thr and Tyr on target proteins). This entry represents the catalytic domain found in a number of serine/threonine- and tyrosine-protein kinases. It does not include the catalytic domain of dual specificity kinases. [1]. 3291115. The protein kinase family: conserved features and deduced. phylogeny of the catalytic domains.. Hanks SK, Quinn AM, Hunter T;. Science. 1988;241:42-52.. [2]. 1956325. Protein kinase catalytic domain sequence database:. identification of conserved features of primary structure and. classification of family members.. Hanks SK, Quinn AM;. Methods Enzymol 1991;200:38-62.. [3]. 7768349. Protein kinases 6. The eukaryotic protein kinase superfamily:. kinase (catalytic) domain structure and classification.. Hanks SK, Hunter T;. FASEB J 1995;9:576-596.. [4]. 9020587. The protein kinases of budding yeast: six score and more.. Hunter T, Plowman GD;. Trends Biochem Sci 1997;22:18-22. (from Pfam)

Date:

2024-08-14

This HMM describes a region found in AarF/ABC1/UbiB family proteins. We do not use the term ABC1 (activator of bc1 complex) in protein product names assigned because of the risk of confusion with ABC (ATP-binding cassette) transporter proteins.

Date:

2024-08-14

This is a family of atypical serine kinases which are found in archaea, bacteria and eukaryotes. Activity of Rio1 is vital in Saccharomyces cerevisiae for the processing of ribosomal RNA, as well as for proper cell cycle progression and chromosome maintenance. The structure of RIO1 has been determined [4]. [1]. 12021457. Lipopolysaccharide phosphorylating enzymes encoded in the. genomes of Gram-negative bacteria are related to the eukaryotic. protein kinases.. Krupa A, Srinivasan N;. Protein Sci 2002;11:1580-1584.. [2]. 12612080. Late cytoplasmic maturation of the small ribosomal subunit. requires RIO proteins in Saccharomyces cerevisiae.. Vanrobays E, Gelugne JP, Gleizes PE, Caizergues-Ferrer M;. Mol Cell Biol 2003;23:2083-2095.. [3]. 12690111. Rio2p: An evolutionarily conserved, low-abundant protein kinase. essential for processing of 20S Pre-rRNA in Saccharomyces. cerevisiae.. Geerlings TH, Faber AW, Bister M, Vos JC, Raue HA;. 0;0:0-0.. [4]. 16008568. Structure and activity of the atypical serine kinase Rio1.. Laronde-Leblanc N, Guszczynski T, Copeland T, Wlodawer A;. FEBS J 2005;272:3698-3713. (from Pfam)

Date:

2024-08-14

Date:

2024-08-14