Identification and characterization of two chitin-binding proteins from the peritrophic membrane of the silkworm, Bombyx mori L
| Autor: | Yun-gen Miao, Hua-jun Yang, Jiabiao Hu, Chun-guang Sun, Fang Zhou, Roy Bhaskar, Firdose Ahmad Malik, Xing-hua Li |
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| Rok vydání: | 2010 |
| Předmět: |
Protein family
Physiology Sequence alignment Chitin Biochemistry Amidohydrolases Protein structure Bombyx mori Chitin binding Animals Amino Acid Sequence Cloning Molecular Peptide sequence chemistry.chemical_classification biology Base Sequence Reverse Transcriptase Polymerase Chain Reaction Gene Expression Profiling fungi General Medicine biology.organism_classification Bombyx Molecular biology Amino acid Protein Structure Tertiary chemistry Gene Expression Regulation Insect Science Insect Proteins Sequence Alignment Cysteine |
| Zdroj: | Archives of insect biochemistry and physiology. 75(4) |
| ISSN: | 1520-6327 |
| Popis: | The peritrophic membrane (PM) is a semi-permeable lining of the insect midgut, broadly analogous to the mucous lining of vertebrate gut. The PM proteins are important achievements for the function of the PM. In this study, two chitin-binding proteins (BmPM-P43 and BmPM-P41) from the PM of the silkworm, Bombyx mori, were identified and cloned. These proteins showed the molecular mass of 43 and 41 kDa, respectively. The deduced amino acid sequences codes for a protein of 381 amino acid residues and 364 amino acid residues, containing 12 and 14 cysteine residues followed by similar domain, both of them have 5 cysteine residues in similar position in the C-terminal. The confirmation of these proteins was performed by western blot analysis of recombinant BmPM-P43 and BmPM-P41. The chitin-binding activity analysis showed that the BmPM-P43 and BmPM-P41 could bind to chitin strongly. It is concluded that BmPM-P43 and BmPM-P41 contains a polysaccharide deacetylase domain instead of peritrophin domain, indicated that these two proteins may belong to a new chitin-binding protein family. © 2010 Wiley Periodicals, Inc. |
| Databáze: | OpenAIRE |
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