Cloning and molecular characterization of scorpion Buthus martensi venom hyaluronidases: a novel full-length and diversiform noncoding isoforms |
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Authors: | Xichao Xia Rongzhi LiuYi Li Shipeng XueQingchun Liu Xiao JiangWenjuan Zhang Ke Ding |
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Affiliation: | Basal Medical College of Nanyang Medical University, Nanyang, 473041 Henan Province, China |
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Abstract: | Hyaluronidase is a common component of scorpion venom and has been considered as “spreading factor” that promotes a fast penetration of the venom in the anaphylactic reaction. In the current study, a novel full-length of hyaluronidase BmHYI and three noncoding isoforms of BmHYII, BmHYIII and BmHYIV were cloned by using a combined strategy based on peptide sequencing and Rapid Amplification of cDNA Ends (RACE). BmHYI has 410 amino acid residues containing the catalytic, positional and five potential N-glycosylation sites. The deduced protein sequence of BmHYI shares significant identity with venom hyaluronidases from bees and snakes. The phylogenetic analysis showed early divergence and independent evolution of BmHYI from other hyaluronidases. An extraordinarily high level of sequence similarity was detected among four sequences. But, BmHYII, BmHYIII and BmHYIV were short of stop-codon in the open reading frame and poly(A) signal in the 3′ end. |
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Keywords: | BmHYI, Buthus martensi hyaluronidase I BmHYII, Buthus martensi hyaluronidase II BmHYIII, Buthus martensi hyaluronidase III BmHYIV, Buthus martensi hyaluronidase IV |
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