Structural and functional characterization of a recombinant leucine aminopeptidase

Hernández-Moreno, Ana V.; Perdomo-Abúndez, Francisco C.; Martínez, Víctor Pérez Medina; Luna‐Bárcenas, Gabriel; Villaseñor-Ortega, Francisco; Pérez, Nestor O.; López‐Morales, Carlos A.; Flores-Ortiz, Luis F.; Medina‐Rivero, Emilio

doi:10.1016/j.molcatb.2014.12.013

Cited by 7 publications

(1 citation statement)

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“…Many microbial leucyl-aminopeptidases have been heterologously expressed and characterised. There are also many reports on the relationship between structure and function of leucylaminopeptidase [10,16,17]. The tertiary and quaternary structures of proteins provide valuable information about the molecular mechanism of their functions.…”

Section: Introductionmentioning

confidence: 99%

Expression, Characterisation, Homology Modelling and Molecular Docking of a Novel M17 Family Leucyl-Aminopeptidase from Bacillus cereus CZ

Liu,

Cui

2023

IJMS

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Leucyl-aminopeptidase (LAP), an important metallopeptidase, hydrolyses amino acid residues from the N-terminus of polypeptides and proteins, acting preferentially on the peptide bond formed by N-terminus leucine. A new leucyl-aminopeptidase was found in Bacillus cereus CZ. Its gene (bclap) contained a 1485 bp ORF encoding 494 amino acids with a molecular weight of 54 kDa. The bcLAP protein was successfully expressed in E. coli BL21(DE3). Optimal activity is obtained at pH 9.0 and 58 °C. The bcLAP displays a moderate thermostability and an alkaline pH adaptation range. Enzymatic activity is dramatically enhanced by Ni2+. EDTA significantly inhibits the enzymatic activity, and bestatin and SDS also show strong inhibition. The three-dimensional model of bcLAP monomer and homohexamer is simulated byPHYRE2 server and SWISS-MODEL server. The docking of bestatin, Leu-Trp, Asp-Trp and Ala-Ala-Gly to bcLAP is performed using AutoDock4.2.5, respectively. Molecular docking results show that the residues Lys260, Asp265, Lys272, Asp283, Asp342, Glu344, Arg346, Gly372 and His437 are involved in the hydrogen bonding with the ligands and zinc ions. There may be two nucleophilic catalytic mechanisms in bcLAP, one involving His 437 or Arg346 and the other involving His437 and Arg346. The bcLAP can hydrolyse the peptide bonds in Leu-Trp, Asp-Trp and Ala-Ala-Gly.

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Section: Introductionmentioning

confidence: 99%