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1pos

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{{STRUCTURE_1pos| PDB=1pos | SCENE= }}
{{STRUCTURE_1pos| PDB=1pos | SCENE= }}
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'''CRYSTAL STRUCTURE OF A NOVEL DISULFIDE-LINKED "TREFOIL" MOTIF FOUND IN A LARGE FAMILY OF PUTATIVE GROWTH FACTORS'''
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===CRYSTAL STRUCTURE OF A NOVEL DISULFIDE-LINKED "TREFOIL" MOTIF FOUND IN A LARGE FAMILY OF PUTATIVE GROWTH FACTORS===
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==Overview==
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Porcine pancreatic spasmolytic polypeptide (PSP) belongs to a large family of homologous growth factor-like polypeptides characterized by a disulfide-linked "trefoil motif," duplicated and conserved in various family members. PSP contains two trefoil motifs, has several pharmacological actions on the gut, and has growth factor properties on epithelial cells in vitro. The human PSP analogue, human spasmolytic polypeptide, appears to be involved in many regenerative situations and, especially, in healing gastrointestinal ulcers. One member of the trefoil family, pS2, is secreted in approximately 50% of estrogen-dependent human breast carcinomas, which has led to its use as a tumor prognostic marker. Both pS2 and human spasmolytic polypeptide are also widely expressed in chronic gastrointestinal ulcerative conditions such as Crohn disease. Here we report the three-dimensional structure at 2.6-A resolution of a trefoil-containing protein, namely PSP, purified from porcine pancreas. The structure shows two homologous domains that share a supersecondary structure and disulfide bond pattern. The two domains pack asymmetrically giving rise to a number of protruding loops, exposed clefts, and an unusual electrostatic surface potential. Knowledge of the structure of PSP should allow the design of mutants to investigate further the function of PSP and other trefoil-containing peptides.
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(as it appears on PubMed at http://www.pubmed.gov), where 8302836 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8302836}}
==About this Structure==
==About this Structure==
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[[Category: Sanderson, M R.]]
[[Category: Sanderson, M R.]]
[[Category: Growth factor]]
[[Category: Growth factor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 05:18:54 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 20:11:38 2008''

Revision as of 17:11, 28 July 2008

Image:1pos.png

Template:STRUCTURE 1pos

CRYSTAL STRUCTURE OF A NOVEL DISULFIDE-LINKED "TREFOIL" MOTIF FOUND IN A LARGE FAMILY OF PUTATIVE GROWTH FACTORS

Template:ABSTRACT PUBMED 8302836

About this Structure

1POS is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Crystal structure of a disulfide-linked "trefoil" motif found in a large family of putative growth factors., De A, Brown DG, Gorman MA, Carr M, Sanderson MR, Freemont PS, Proc Natl Acad Sci U S A. 1994 Feb 1;91(3):1084-8. PMID:8302836

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