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Cloning and sequence analysis of complete cDNA of chitin deacetylase from Mucor racemosus

  • Jiang Xia-Yun (a1), Zou Shu-Ming (a2) and Zhou Pei-Gen (a1)

Abstract

A complete chitin deacetylase (CDA) complementary DNA (cDNA) from Mucor racemosus was cloned and sequenced by reverse transcription-polymerase chain reaction (RT-PCR) and rapid amplification cDNA end (RACE) with gene special conserved primers. The cDNA sequence was submitted to GenBank (DQ538514). The complete cDNA with full-length of 1506 bp contained a 67 bp 5′-untranslated region, an open reading frame of 1344 bp and 95 bp 3′-untranslated region including tailing site AATAAA. The gene encoded a sequence of 448 amino acid residues and consisted of core nucleotides encoding a polysaccharide deacetylase domain covering 32% of the entire sequence. The CDA gene shared sequence homology with those of several fungi. The corresponding homology of the deduced amino acid sequences varied from 21 to 69%. Phylogenetic analysis according to the deduced amino acid sequences matched the classical fungi taxonomy. The three-dimensional structure of this protein was predicted. The protein had a whole CDA functional domain and a polysaccharide deacetylase domain.

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Corresponding author

*Corresponding author. E-mail: smzou@shfu.edu.cn

References

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