2lfj
From Proteopedia
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==Solution structure of the monomeric derivative of BS-RNase== | ==Solution structure of the monomeric derivative of BS-RNase== | ||
| - | <StructureSection load='2lfj' size='340' side='right' caption='[[2lfj | + | <StructureSection load='2lfj' size='340' side='right'caption='[[2lfj]]' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | [[2lfj]] is a 1 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[2lfj]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LFJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LFJ FirstGlance]. <br> |
| - | <b> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 10 models</td></tr> |
| - | <b>Resources:</b> <span class='plainlinks'>[ | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2lfj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lfj OCA], [https://pdbe.org/2lfj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2lfj RCSB], [https://www.ebi.ac.uk/pdbsum/2lfj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2lfj ProSAT]</span></td></tr> |
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/RNS_BOVIN RNS_BOVIN] This enzyme hydrolyzes both single- and double-stranded RNA. | ||
| + | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
Three-dimensional domain swapping is a common phenomenon in pancreatic-like ribonucleases. In the aggregated state, these proteins acquire new biological functions, including selective cytotoxicity against tumour cells. RNase A is able to dislocate both N- and C-termini, but usually this process requires denaturing conditions. In contrast, bovine seminal ribonuclease (BS-RNase), which is a homo-dimeric protein sharing 80% of sequence identity with RNase A, occurs natively as a mixture of swapped and unswapped isoforms. The presence of two disulfides bridging the subunits, indeed, ensures a dimeric structure also to the unswapped molecule. In vitro, the two BS-RNase isoforms interconvert under physiological conditions. Since the tendency to swap is often related to the instability of the monomeric proteins, in these paper we have analysed in detail the stability in solution of the monomeric derivative of BS-RNase (mBS) by a combination of NMR studies and Molecular Dynamics Simulations. The refinement of NMR structure and relaxation data indicate a close similarity with RNase A, without any evidence of aggregation or partial opening. The high compactness of mBS structure is confirmed also by H/D exchange, urea denaturation, and TEMPOL mapping of the protein surface. The present extensive structural and dynamic investigation of (monomeric) mBS did not show any experimental evidence that could explain the known differences in swapping between BS-RNase and RNase A. Hence, we conclude that the swapping in BS-RNase must be influenced by the distinct features of the dimers, suggesting a prominent role for the interchain disulfide bridges. | Three-dimensional domain swapping is a common phenomenon in pancreatic-like ribonucleases. In the aggregated state, these proteins acquire new biological functions, including selective cytotoxicity against tumour cells. RNase A is able to dislocate both N- and C-termini, but usually this process requires denaturing conditions. In contrast, bovine seminal ribonuclease (BS-RNase), which is a homo-dimeric protein sharing 80% of sequence identity with RNase A, occurs natively as a mixture of swapped and unswapped isoforms. The presence of two disulfides bridging the subunits, indeed, ensures a dimeric structure also to the unswapped molecule. In vitro, the two BS-RNase isoforms interconvert under physiological conditions. Since the tendency to swap is often related to the instability of the monomeric proteins, in these paper we have analysed in detail the stability in solution of the monomeric derivative of BS-RNase (mBS) by a combination of NMR studies and Molecular Dynamics Simulations. The refinement of NMR structure and relaxation data indicate a close similarity with RNase A, without any evidence of aggregation or partial opening. The high compactness of mBS structure is confirmed also by H/D exchange, urea denaturation, and TEMPOL mapping of the protein surface. The present extensive structural and dynamic investigation of (monomeric) mBS did not show any experimental evidence that could explain the known differences in swapping between BS-RNase and RNase A. Hence, we conclude that the swapping in BS-RNase must be influenced by the distinct features of the dimers, suggesting a prominent role for the interchain disulfide bridges. | ||
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NMR Studies on Structure and Dynamics of the Monomeric Derivative of BS-RNase: New Insights for 3D Domain Swapping.,Spadaccini R, Ercole C, Gentile MA, Sanfelice D, Boelens R, Wechselberger R, Batta G, Bernini A, Niccolai N, Picone D PLoS One. 2012;7(1):e29076. Epub 2012 Jan 12. PMID:22253705<ref>PMID:22253705</ref> | NMR Studies on Structure and Dynamics of the Monomeric Derivative of BS-RNase: New Insights for 3D Domain Swapping.,Spadaccini R, Ercole C, Gentile MA, Sanfelice D, Boelens R, Wechselberger R, Batta G, Bernini A, Niccolai N, Picone D PLoS One. 2012;7(1):e29076. Epub 2012 Jan 12. PMID:22253705<ref>PMID:22253705</ref> | ||
| - | From | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| + | </div> | ||
| + | <div class="pdbe-citations 2lfj" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: Picone | + | [[Category: Picone D]] |
| - | [[Category: Spadaccini | + | [[Category: Spadaccini R]] |
| - | + | ||
Current revision
Solution structure of the monomeric derivative of BS-RNase
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