2LLP

Solution structure of a THP type 1 alpha 1 collagen fragment (772-786)

2LLP の概要

• エントリーDOI: 10.2210/pdb2llp/pdb
• NMR情報: BMRB: 18083
• 分子名称: Collagen alpha-1(I) chain (1 entity in total)
• 機能のキーワード: triple helical peptide, structural protein, contractile protein, structural genomics, structural proteomics in europe 2, spine-2
• 由来する生物種: Homo sapiens (Human)
• 細胞内の位置: Secreted, extracellular space, extracellular matrix (By similarity): P02452
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 4973.68

構造登録者

Bertini, I.,Fragai, M.,Luchinat, C.,Melikian, M.,Toccafondi, M.,Lauer, J.L.,Fields, G.B.,Structural Proteomics in Europe 2 (SPINE-2) (登録日: 2011-11-15, 公開日: 2012-05-30, 最終更新日: 2024-05-01)

主引用文献

Bertini, I.,Fragai, M.,Luchinat, C.,Melikian, M.,Toccafondi, M.,Lauer, J.L.,Fields, G.B.
Structural basis for matrix metalloproteinase 1-catalyzed collagenolysis.
J.Am.Chem.Soc., 134:2100-2110, 2012

PubMed Abstract: The proteolysis of collagen triple-helical structure (collagenolysis) is a poorly understood yet critical physiological process. Presently, matrix metalloproteinase 1 (MMP-1) and collagen triple-helical peptide models have been utilized to characterize the events and calculate the energetics of collagenolysis via NMR spectroscopic analysis of 12 enzyme-substrate complexes. The triple-helix is bound initially by the MMP-1 hemopexin-like (HPX) domain via a four amino acid stretch (analogous to type I collagen residues 782-785). The triple-helix is then presented to the MMP-1 catalytic (CAT) domain in a distinct orientation. The HPX and CAT domains are rotated with respect to one another compared with the X-ray "closed" conformation of MMP-1. Back-rotation of the CAT and HPX domains to the X-ray closed conformation releases one chain out of the triple-helix, and this chain is properly positioned in the CAT domain active site for subsequent hydrolysis. The aforementioned steps provide a detailed, experimentally derived, and energetically favorable collagenolytic mechanism, as well as significant insight into the roles of distinct domains in extracellular protease function.

PubMed: 22239621
DOI: 10.1021/ja208338j

実験手法

SOLUTION NMR