3rub

From Proteopedia

(Difference between revisions)

Revision as of 09:28, 25 December 2014

CRYSTAL STRUCTURE OF THE UNACTIVATED FORM OF RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE(SLASH)OXYGENASE FROM TOBACCO REFINED AT 2.0-ANGSTROMS RESOLUTION

Structural highlights

3rub is a 2 chain structure with sequence from Nicotiana tabacum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Activity:	Ribulose-bisphosphate carboxylase, with EC number 4.1.1.39
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[RBL_TOBAC] RuBisCO catalyzes two reactions: the carboxylation of D-ribulose 1,5-bisphosphate, the primary event in carbon dioxide fixation, as well as the oxidative fragmentation of the pentose substrate in the photorespiration process. Both reactions occur simultaneously and in competition at the same active site.[HAMAP-Rule:MF_01338] [RBS_TOBAC] RuBisCO catalyzes two reactions: the carboxylation of D-ribulose 1,5-bisphosphate, the primary event in carbon dioxide fixation, as well as the oxidative fragmentation of the pentose substrate. Both reactions occur simultaneously and in competition at the same active site.

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

The structure of the unactivated form of ribulose-1,5-bisphosphate carboxylase/oxygenase was refined at a resolution of 2.0 A to an R-factor of 17.1%. The previous model (Chapman et al., 1988) was extensively rebuilt, and the small subunit was retraced. The refined model consists of residues 22-63 and 69-467 of the large subunit and the complete small subunit. A striking feature of the model is that several loops have very high B-factors, probably representing mobile regions of the molecule. An examination of the intersubunit contacts shows that the L8S8 hexadecamer is composed of four L2 dimers. The dominant contacts between these L2 dimers are formed by the small subunits. This suggests that the small subunits may be essential for maintaining the integrity of the L8S8 structure. The active site shows differences between the unactivated form and the quaternary complex. In particular, Lys334 has moved out of the active site by about 10A. This residue lies on loop 6 of the alpha beta barrel, which is a particularly mobile loop. The site of ribulose-1,5-bisphosphate carboxylase/oxygenase activation is well ordered in the absence of the carbamylation of Lys201 and Mg2+ binding. The residues are held poised by a network of hydrogen bonds. In the unactivated state, the active site is accessible to substrate binding.

Crystal structure of the unactivated form of ribulose-1,5-bisphosphate carboxylase/oxygenase from tobacco refined at 2.0-A resolution.,Curmi PM, Cascio D, Sweet RM, Eisenberg D, Schreuder H J Biol Chem. 1992 Aug 25;267(24):16980-9. PMID:1512238^[1]

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

References

↑ Curmi PM, Cascio D, Sweet RM, Eisenberg D, Schreuder H. Crystal structure of the unactivated form of ribulose-1,5-bisphosphate carboxylase/oxygenase from tobacco refined at 2.0-A resolution. J Biol Chem. 1992 Aug 25;267(24):16980-9. PMID:1512238

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/3rub"

@@ Line 7: / Line 7: @@
 <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=3rub FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rub OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3rub RCSB], [http://www.ebi.ac.uk/pdbsum/3rub PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/RBL_TOBAC RBL_TOBAC]] RuBisCO catalyzes two reactions: the carboxylation of D-ribulose 1,5-bisphosphate, the primary event in carbon dioxide fixation, as well as the oxidative fragmentation of the pentose substrate in the photorespiration process. Both reactions occur simultaneously and in competition at the same active site.[HAMAP-Rule:MF_01338] [[http://www.uniprot.org/uniprot/RBS_TOBAC RBS_TOBAC]] RuBisCO catalyzes two reactions: the carboxylation of D-ribulose 1,5-bisphosphate, the primary event in carbon dioxide fixation, as well as the oxidative fragmentation of the pentose substrate. Both reactions occur simultaneously and in competition at the same active site.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

3rub

From Proteopedia

Revision as of 09:28, 25 December 2014

CRYSTAL STRUCTURE OF THE UNACTIVATED FORM OF RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE(SLASH)OXYGENASE FROM TOBACCO REFINED AT 2.0-ANGSTROMS RESOLUTION

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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