1an1
From Proteopedia
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LEECH-DERIVED TRYPTASE INHIBITOR/TRYPSIN COMPLEX
Overview
BACKGROUND: Tryptase is a trypsin-like serine proteinase stored in the, cytoplasmic granules of mast cells, which has been implicated in a number, of mast cell related disorders such as asthma and rheumatoid arthritis., Unlike almost all other serine proteinases, tryptase is fully active in, plasma and in the extracellular space, as there are no known natural, inhibitors of tryptase in humans. Leech-derived tryptase inhibitor (LDTI), a protein of 46 amino acids, is the first molecule found to bind tightly, to and specifically inhibit human tryptase in the nanomolar range. LDTI, also inhibits trypsin and chymotrypsin with similar affinities. The, structure of LDTI in complex with an inhibited proteinase could be used as, a template for the development of low molecular weight tryptase, ... [(full description)]
About this Structure
1AN1 is a [Protein complex] structure of sequences from [Hirudo medicinalis] and [Sus scrofa] with CA as [ligand]. Active as [Trypsin], with EC number [3.4.21.4]. Structure known Active Sites: CA and P1. Full crystallographic information is available from [OCA].
Reference
Structure of the complex of leech-derived tryptase inhibitor (LDTI) with trypsin and modeling of the LDTI-tryptase system., Di Marco S, Priestle JP, Structure. 1997 Nov 15;5(11):1465-74. PMID:9384562
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