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KMID : 0880220130510050627
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Journal of Microbiology
2013 Volume.51 No. 5 p.627 ~ p.632
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Crystal Structure of XoLAP, a Leucine Aminopeptidase, from Xanthomonas oryzae pv. oryzae
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Kim Jin-Kwang
Sampath Natarajan
Park Han-seul
Kim Hung-Huynh
Lee Sang-Hee
Kim Jeong-Gu
Ahn Yeh-Jin
Kang Lin-Woo
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Abstract
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Aminopeptidases are metalloproteinases that degrade N-terminal residues from protein and play important roles in cell growth and development by controlling cell homeostasis and protein maturation. We determined the crystal structure of XoLAP, a leucyl aminopeptidase, at 2.6 A resolution from Xanthomonas oryzae pv. oryzae, causing the destructive rice disease of bacterial blight. It is the first crystal structure of aminopeptidase from phytopathogens as a drug target. XoLAP existed as a hexamer and the monomer structure consisted of an N-terminal cap domain and a C-terminal peptidase domain with two divalent zinc ions. XoLAP structure was compared with BlLAP and EcLAP (EcPepA) structures. Based on the structural comparison, the molecular model of XoLAP in complex with the natural aminopeptidase inhibitor of microginin FR1 was proposed. The model structure will be useful to develop a novel antibacterial drug against Xoo.
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KEYWORD
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aminopeptidase, Xanthomonas oryzae pv. oryzae (Xoo), microginin FR1, crystal structure, drug target
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