2cio

The high resolution x-ray structure of papain complexed with fragments of the Trypanosoma brucei cysteine protease inhibitor ICP.

spinqualitylabelsall models 2cio, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2cio is a 2 chain structure with sequence from Carica papaya and Trypanosoma (trypanozoon) brucei. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACT, GOL NonStd Res: OCS Related: 1bp4, 1bqi, 1cvz, 1eff, 1khp, 1khq, 1pad, 1pe6, 1pip, 1pop, 1ppd, 1ppn, 1ppp, 1stf, 2pad, 4pad, 5pad, 6pad, 9pap Activity: Papain, with EC number 3.4.22.2 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Attempts to cocrystallize the cysteine protease papain derived from the latex of Carica papaya with an inhibitor of cysteine proteases (ICP) from Trypanosoma brucei were unsuccessful. However, crystals of papain that diffracted to higher resolution, 1.5 A, than other crystals of this archetypal cysteine protease were obtained, so the analysis was continued. Surprisingly, the substrate-binding cleft was occupied by two short peptide fragments which have been assigned as remnants of ICP. Comparisons reveal that these peptides bind in the active site in a manner similar to that of the human cysteine protease inhibitor stefin B when it is complexed to papain. The assignment of the fragment sequences is consistent with the specificity of the protease. High-resolution complex of papain with remnants of a cysteine protease inhibitor derived from Trypanosoma brucei.,Alphey MS, Hunter WN Acta Crystallogr Sect F Struct Biol Cryst Commun. 2006 Jun 1;62(Pt, 6):504-8. Epub 2006 May 5. PMID:16754967 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Papain

Proteopedia Page Contributors and Editors (what is this?)

OCA