mechanistic insight into the elastin degradation process by the metalloprotease myroilysin from the deep-sea bacterium myroides profundi d25
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2015
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Abstract
Elastases have been widely studied because of their important uses as medicine and meat tenderizers. However, there are relatively few studies on marine elastases. Myroilysin, secreted by Myroides profundi D25 from deep-sea sediment, is a novel elastase. In this study, we examined the elastin degradation mechanism of myroilysin. When mixed with insoluble bovine elastin, myroilysin bound hydrophobically, suggesting that this elastase may interact with the hydrophobic domains of elastin. Consistent with this, analysis of the cleavage pattern of myroilysin on bovine elastin and recombinant tropoelastin revealed that myroilysin preferentially cleaves peptide bonds with hydrophobic residues at the P1 and/or P1′ positions. Scanning electron microscopy (SEM) of cross-linked recombinant tropoelastin degraded by myroilysin showed preferential damages of spherules over cross-links, as expected for a hydrophobic preference. The degradation process of myroilysin on bovine elastin fibres was followed by light microscopy and SEM, revealing that degradation begins with the formation of crevices and cavities at the fibre surface, with these openings increasing in number and size until the fibre breaks into small pieces, which are subsequently fragmented. Our results are helpful for developing biotechnological applications for myroilysin.
| Reference Key |
yang2015marinemechanistic
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| Authors | ;Jie Yang;Hui-Lin Zhao;Bai-Lu Tang;Xiu-Lan Chen;Hai-Nan Su;Xi-Ying Zhang;Xiao-Yan Song;Bai-Cheng Zhou;Bin-Bin Xie;Anthony S. Weiss;Yu-Zhong Zhang |
| Journal | jixie gongcheng xuebao/journal of mechanical engineering |
| Year | 2015 |
| DOI |
10.3390/md13031481
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| URL | |
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