1qdm: Difference between revisions

[[Image:1qdm.gif|left|200px]]<br /><applet load="1qdm" size="350" color="white" frame="true" align="right" spinBox="true"  

We determined at 2.3 A resolution the crystal structure of prophytepsin, a zymogen of a barley vacuolar aspartic proteinase. In addition to the classical pepsin-like bilobal main body of phytepsin, we also traced most of the propeptide, as well as an independent plant-specific domain, never before described in structural terms. The structure revealed that, in addition to the propeptide, 13 N-terminal residues of the mature phytepsin are essential for inactivation of the enzyme. Comparison of the plant-specific domain with NK-lysin indicates that these two saposin-like structures are closely related, suggesting that all saposins and saposin-like domains share a common topology. Structural analysis of prophytepsin led to the identification of a putative membrane receptor-binding site involved in Golgi-mediated transport to vacuoles.

1QDM is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Hordeum_vulgare Hordeum vulgare]. Active as [http://en.wikipedia.org/wiki/Phytepsin Phytepsin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.23.40 3.4.23.40] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QDM OCA].  

[[Category: Tobin, G J.]]

[[Category: Waugh, D S.]]

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