RGD Reference Report - cDNA cloning of rat proteasome subunit RC7-I, a homologue of yeast PRE1 essential for chymotrypsin-like activity. - Rat Genome Database

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cDNA cloning of rat proteasome subunit RC7-I, a homologue of yeast PRE1 essential for chymotrypsin-like activity.

Authors: Nishimura, C  Tamura, T  Tokunaga, F  Tanaka, K  Ichihara, A 
Citation: Nishimura C, etal., FEBS Lett 1993 Oct 11;332(1-2):52-6.
RGD ID: 61713
Pubmed: PMID:8405448   (View Abstract at PubMed)

The nucleotide sequence of a cDNA that encodes a new subunit, named RC7-I, of the 20 S proteasome of rat hepatoma cells has been determined. The polypeptide predicted from the open reading frame consists of 201 amino acid residues with a calculated molecular weight of 22,912 and isoelectric point of 7.25. Approximately 80% of the partial amino acid sequences of several fragments of RC7-I, determined by protein chemical analyses, were found to be in excellent accordance with those deduced from the cDNA sequence. Computer analysis showed that RC7-I belongs to the beta-type subgroup of proteasomes with similarity to the beta-subunit of the archaebacterial proteasome, differing clearing from alpha-type subunits of the proteasome gene family. The overall structure of RC7-I was found to be homologous to that of yeast PRE1, which is necessary for chymotryptic activity.

Objects referenced in this article
Gene Psmb2 proteasome 20S subunit beta 2 Rattus norvegicus

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