Elastase (ELA) is a chymotrypsin-like serine protease which breaks down proteins. The ELAs are numbered according to their genes. Panceatic ELA cleaves proteins at the carboxyl-terminal side of small neutral amino acids. It cleaves Ala-Ala and Ala-Gly bonds. [1] For additional details see

Relevance

ELA1 in the pancreas correlates well with exocrine pancreatic functioning and is used as a function test for patients with pancreatitis. ELA2 (or PMN-ELA) is secreted by neutrophils during inflammation.

Disease

Pulmonary emphysema is caused by the destruction of elastic fibre by elastase. Mutations in ELA2 are linked to the genetic disorder cyclic hematopoeiesis. Neutrophil elastase is involved in the blistering in bullose pemphigoid.

Structural highlights

(cyan, green) complex with (magenta, yellow) (PDB code 1eai). ELA .[2]

3D structures of elastase

Elastase 3D structures


Pig elastase (cyan, green) complex with chymotrypsin/elastase isoinhibitor (magenta, yellow) (PDB code 1eai).

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ReferencesReferences

  1. Dominici R, Franzini C. Fecal elastase-1 as a test for pancreatic function: a review. Clin Chem Lab Med. 2002 Apr;40(4):325-32. PMID:12059069 doi:http://dx.doi.org/10.1515/CCLM.2002.051
  2. Huang K, Strynadka NC, Bernard VD, Peanasky RJ, James MN. The molecular structure of the complex of Ascaris chymotrypsin/elastase inhibitor with porcine elastase. Structure. 1994 Jul 15;2(7):679-89. PMID:7922044

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