Phylogenic relationships of the amino acid sequences of prosome (proteasome, MCP) subunits.
Prosomes [or proteasomes, Multi-Catalytic Proteinase (MCP) are multisubunit protein complexes, found from archaebacteria to man, the structure of which (a 4-layer cylinder) is remarkable conserved. They were first observed as subcomplexes of untranslated mRNP, and then as a multicatalytic proteinase with several proteolytic activities. A number of sequences from subunits of these complexes are now available. Analysis of the sequences shows that these subunits are evolutionarily related, and reveals three highly conserved amino acid stretches. Based on a phylogenic approach, we propose to classify the sequenced subunits into 14 families, which fall into two superfamilies, of the alpha- and beta-type. These data, together with several recently published observations, suggest that some subunits may be interchangeable within the complexes, which would thus constitute a population of heterogenous particles.
Institut Jacques Monod CNRS, Université Paris, France.
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Coux
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Nothwang
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Silva Pereira
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Recillas Targa
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Bey
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Scherrer
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D016384:Consensus Sequence; D003546:Cysteine Endopeptidases / Q000235:genetics*; D005796:Genes; D006801:Humans; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000235:genetics*; D005810:Multigene Family; D010802:Phylogeny; D046988:Proteasome Endopeptidase Complex; D017386:Sequence Homology, Amino Acid
D009097:Multienzyme Complexes; D003546:Cysteine Endopeptidases; D046988:Proteasome Endopeptidase Complex