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1y92

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Revision as of 07:02, 25 April 2018

Crystal structure of the P19A/N67D Variant Of Bovine seminal Ribonuclease

Structural highlights

1y92 is a 2 chain structure with sequence from Bovin. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1bsr, 1r5d, 1y94
Gene:	SRN (BOVIN)
Activity:	Pancreatic ribonuclease, with EC number 3.1.27.5
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RNS_BOVIN] This enzyme hydrolyzes both single- and double-stranded RNA.

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

Bovine seminal ribonuclease (BS-RNase) is a covalent homodimeric enzyme homologous to pancreatic ribonuclease (RNase A), endowed with a number of special biological functions. It is isolated as an equilibrium mixture of swapped (MxM) and unswapped (M=M) dimers. The interchanged N termini are hinged on the main bodies through the peptide 16-22, which changes conformation in the two isomers. At variance with other proteins, domain swapping in BS-RNase involves two dimers having a similar and highly constrained quaternary association, mainly dictated by two interchain disulfide bonds. This provides the opportunity to study the intrinsic ability to swap as a function of the hinge sequence, without additional effects arising from dissociation or quaternary structure modifications. Two variants, having Pro19 or the whole sequence of the hinge replaced by the corresponding residues of RNase A, show equilibrium and kinetic parameters of the swapping similar to those of the parent protein. In comparison, the x-ray structures of MxM indicate, within a substantial constancy of the quaternary association, a greater mobility of the hinge residues. The relative insensitivity of the swapping tendency to the substitutions in the hinge region, and in particular to the replacement of Pro19 by Ala, contrasts with the results obtained for other swapped proteins and can be rationalized in terms of the unique features of the seminal enzyme. Moreover, the results indirectly lend credit to the hypothesis that the major role of Pro19 resides in directing the assembly of the non-covalent dimer, the species produced by selective reduction of the interchain disulfides and considered responsible for the special biological functions of BS-RNase.

The role of the hinge loop in domain swapping. The special case of bovine seminal ribonuclease.,Picone D, Di Fiore A, Ercole C, Franzese M, Sica F, Tomaselli S, Mazzarella L J Biol Chem. 2005 Apr 8;280(14):13771-8. Epub 2005 Jan 12. PMID:15647261^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Picone D, Di Fiore A, Ercole C, Franzese M, Sica F, Tomaselli S, Mazzarella L. The role of the hinge loop in domain swapping. The special case of bovine seminal ribonuclease. J Biol Chem. 2005 Apr 8;280(14):13771-8. Epub 2005 Jan 12. PMID:15647261 doi:10.1074/jbc.M413157200

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1y92"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the P19A/N67D Variant Of Bovine seminal Ribonuclease==
 <StructureSection load='1y92' size='340' side='right' caption='[[1y92]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SRN ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9913 BOVIN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pancreatic_ribonuclease Pancreatic ribonuclease], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.27.5 3.1.27.5] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1y92 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y92 OCA], [http://pdbe.org/1y92 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y92 RCSB], [http://www.ebi.ac.uk/pdbsum/1y92 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1y92 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y92 OCA], [http://pdbe.org/1y92 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y92 RCSB], [http://www.ebi.ac.uk/pdbsum/1y92 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1y92 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/y9/1y92_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/y9/1y92_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1y92

From Proteopedia

Revision as of 07:02, 25 April 2018

Crystal structure of the P19A/N67D Variant Of Bovine seminal Ribonuclease

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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