Analyses of non-leucine-rich repeat (non-LRR) regions intervening between LRRs in proteins.
Biochim Biophys Acta
; 1790(10): 1217-37, 2009 Oct.
Article
em En
| MEDLINE
| ID: mdl-19580846
ABSTRACT
BACKGROUND:
Many proteins have LRR (leucine-rich repeat) units interrupted by non-LRRs which we call IR (non-LRR island region).METHODS:
We identified proteins containing LRR@IRs (LRRs having IR) by using a new method and then analyzed their natures and distributions.RESULTS:
LRR@IR proteins were found in over two hundred proteins from prokaryotes and from eukaryotes. These are divided into twenty-one different protein families. The IRs occur one to four times in LRR regions and range in length from 5 to 11,265 residues. The IR lengths in Fungi adenylate cyclases (acys) range from 5 to 116 residues; there are 22 LRR repeats. The IRs in Leishmania proteophosphoglycans (ppgs) vary from 105 to 11,265 residues. These results indicate that the IRs evolved rapidly. A group of LRR@IR proteins-LRRC17, chondroadherin-like protein, ppgs, and four Pseudomonas proteins-have a super motif consisting of an LRR block and its adjacent LRR@IR region. This indicates that the entire super motif experienced duplication. The sequence analysis of IRs offers functional similarity in some LRR@IR protein families. GENERALSIGNIFICANCE:
This study suggests that various IRs and super motifs provide a great variety of structures and functions for LRRs.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Proteínas
/
Biologia Computacional
/
Bases de Dados de Proteínas
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Biochim Biophys Acta
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Japão