1stf: Difference between revisions

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<StructureSection load='1stf' size='340' side='right'caption='[[1stf]], [[Resolution|resolution]] 2.37&Aring;' scene=''>
<StructureSection load='1stf' size='340' side='right'caption='[[1stf]], [[Resolution|resolution]] 2.37&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1stf]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Carpa Carpa] and [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1STF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1STF FirstGlance]. <br>
<table><tr><td colspan='2'>[[1stf]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Carica_papaya Carica papaya] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1STF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1STF FirstGlance]. <br>
</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CCS:CARBOXYMETHYLATED+CYSTEINE'>CCS</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.37&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Papain Papain], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.2 3.4.22.2] </span></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CCS:CARBOXYMETHYLATED+CYSTEINE'>CCS</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1stf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1stf OCA], [https://pdbe.org/1stf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1stf RCSB], [https://www.ebi.ac.uk/pdbsum/1stf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1stf ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1stf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1stf OCA], [https://pdbe.org/1stf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1stf RCSB], [https://www.ebi.ac.uk/pdbsum/1stf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1stf ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
[[https://www.uniprot.org/uniprot/CYTB_HUMAN CYTB_HUMAN]] Defects in CSTB are the cause of progressive myoclonic epilepsy type 1 (EPM1) [MIM:[https://omim.org/entry/254800 254800]]. EPM1 is an autosomal recessive disorder characterized by severe, stimulus-sensitive myoclonus and tonic-clonic seizures. The onset, occurring between 6 and 13 years of age, is characterized by convulsions. Myoclonus begins 1 to 5 years later. The twitchings occur predominantly in the proximal muscles of the extremities and are bilaterally symmetrical, although asynchronous. At first small, they become late in the clinical course so violent that the victim is thrown to the floor. Mental deterioration and eventually dementia develop.<ref>PMID:9012407</ref> 
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/CYTB_HUMAN CYTB_HUMAN]] This is an intracellular thiol proteinase inhibitor. Tightly binding reversible inhibitor of cathepsins L, H and B.
[https://www.uniprot.org/uniprot/PAPA1_CARPA PAPA1_CARPA]  
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1stf ConSurf].
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1stf ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
A stoichiometric complex of human stefin B and carboxymethylated papain has been crystallized in a trigonal crystal form. Data to 2.37 A resolution were collected using the area detector diffractometer FAST. The crystal structure of the complex has been solved by Patterson search techniques using papain as search model. Starting from the structure of chicken cystatin, the stefin structure was elucidated through cycles of model building and crystallographic refinement. The current crystallographic R factor is 0.19. Like cystatin, the stefin molecule consists of a five stranded beta-sheet wrapped around a five turn alpha-helix, but with an additional carboxy terminal strand running along the convex side of the sheet. Topological equivalence of stefin and cystatin reveal the previous sequence alignment to be incorrect in part, through deletion of the intermediate helix. The conserved residues form a tripartite wedge, which slots into the papain active site as proposed through consideration of the tertiary structures of the individual components (Bode et al., 1988). The main interactions are provided by the amino terminal 'trunk' (occupying the 'unprimed' subsites of the enzyme), and by the first hairpin loop, containing the highly conserved QVVAG sequence, with minor contributions from the second hairpin loop. The carboxyl terminus of stefin provides an additional interaction region with respect to cystatin. The interaction is dominated by hydrophobic contacts. Inhibition by the cysteine proteinase inhibitors is fundamentally different to that observed for the serine proteinase inhibitors.
The refined 2.4 A X-ray crystal structure of recombinant human stefin B in complex with the cysteine proteinase papain: a novel type of proteinase inhibitor interaction.,Stubbs MT, Laber B, Bode W, Huber R, Jerala R, Lenarcic B, Turk V EMBO J. 1990 Jun;9(6):1939-47. PMID:2347312<ref>PMID:2347312</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1stf" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Papain|Papain]]
*[[Papain|Papain]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Carpa]]
[[Category: Carica papaya]]
[[Category: Human]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Papain]]
[[Category: Bode W]]
[[Category: Bode, W]]
[[Category: Laber B]]
[[Category: Laber, B]]
[[Category: Stubbs MT]]
[[Category: Stubbs, M T]]

Latest revision as of 11:35, 1 May 2024

THE REFINED 2.4 ANGSTROMS X-RAY CRYSTAL STRUCTURE OF RECOMBINANT HUMAN STEFIN B IN COMPLEX WITH THE CYSTEINE PROTEINASE PAPAIN: A NOVEL TYPE OF PROTEINASE INHIBITOR INTERACTIONTHE REFINED 2.4 ANGSTROMS X-RAY CRYSTAL STRUCTURE OF RECOMBINANT HUMAN STEFIN B IN COMPLEX WITH THE CYSTEINE PROTEINASE PAPAIN: A NOVEL TYPE OF PROTEINASE INHIBITOR INTERACTION

Structural highlights

1stf is a 2 chain structure with sequence from Carica papaya and Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.37Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PAPA1_CARPA

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1stf, resolution 2.37Å

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