1mss: Difference between revisions

From Proteopedia
Jump to navigation Jump to search
New page: left|200px<br /><applet load="1mss" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mss, resolution 2.4Å" /> '''LARGE SCALE STRUCTURA...
 
No edit summary
 
(17 intermediate revisions by the same user not shown)
Line 1: Line 1:
[[Image:1mss.gif|left|200px]]<br /><applet load="1mss" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1mss, resolution 2.4&Aring;" />
'''LARGE SCALE STRUCTURAL REARRANGEMENTS OF THE FRONT LOOPS IN MONOMERISED TRIOSEPHOSPHATE ISOMERASE, AS DEDUCED FROM THE COMPARISON OF THE STRUCTURAL PROPERTIES OF MONOTIM AND ITS POINT MUTATION VARIANT MONOSS'''<br />


==Overview==
==LARGE SCALE STRUCTURAL REARRANGEMENTS OF THE FRONT LOOPS IN MONOMERISED TRIOSEPHOSPHATE ISOMERASE, AS DEDUCED FROM THE COMPARISON OF THE STRUCTURAL PROPERTIES OF MONOTIM AND ITS POINT MUTATION VARIANT MONOSS==
BACKGROUND: Wild-type triosephosphate isomerase (TIM) is a very stable, dimeric enzyme. This dimer can be converted into a stable monomeric, protein (monoTIM) by replacing the 15-residue interface loop (loop-3) by a, shorter, 8-residue, loop. The crystal structure of monoTIM shows that two, active-site loops (loop-1 and loop-4), which are at the dimer interface in, wild-type TIM, have acquired rather different structural properties., Nevertheless, monoTIM has residual catalytic activity. RESULTS: Three new, structures of variants of monoTIM are presented, a double-point mutant, crystallized in the presence and absence of bound inhibitor, and a, single-point mutant in the presence of a different inhibitor. These new, structures show large structural variability for the active-site loops, loop-1, loop-4 and loop-8. In the structures with inhibitor bound, the, catalytic lysine (Lys13 in loop-1) and the catalytic histidine (His95 in, loop-4) adopt conformations similar to those observed in wild-type TIM, but very different from the monoTIM structure. CONCLUSIONS: The residual, catalytic activity of monoTIM can now be rationalized. In the presence of, substrate analogues the active-site loops, loop-1, loop-4 and loop-8, as, well as the catalytic residues, adopt conformations similar to those seen, in the wild-type protein. These loops lack conformational flexibility in, wild-type TIM. The data suggest that the rigidity of these loops in, wild-type TIM, resulting from subunit-subunit contacts at the dimer, interface, is important for optimal catalysis.
<StructureSection load='1mss' size='340' side='right'caption='[[1mss]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1mss]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Trypanosoma_brucei_brucei Trypanosoma brucei brucei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MSS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MSS FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</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=1mss FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mss OCA], [https://pdbe.org/1mss PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mss RCSB], [https://www.ebi.ac.uk/pdbsum/1mss PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mss ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TPIS_TRYBB TPIS_TRYBB]
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ms/1mss_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1mss ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1MSS is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Trypanosoma_brucei_brucei Trypanosoma brucei brucei]. Active as [http://en.wikipedia.org/wiki/Triose-phosphate_isomerase Triose-phosphate isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.3.1.1 5.3.1.1] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1MSS OCA].
*[[Triose phosphate isomerase 3D structures|Triose phosphate isomerase 3D structures]]
 
__TOC__
==Reference==
</StructureSection>
Three new crystal structures of point mutation variants of monoTIM: conformational flexibility of loop-1, loop-4 and loop-8., Borchert TV, Kishan KV, Zeelen JP, Schliebs W, Thanki N, Abagyan R, Jaenicke R, Wierenga RK, Structure. 1995 Jul 15;3(7):669-79. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8591044 8591044]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Triose-phosphate isomerase]]
[[Category: Trypanosoma brucei brucei]]
[[Category: Trypanosoma brucei brucei]]
[[Category: Kishan, K.V.Radha.]]
[[Category: Radha Kishan KV]]
[[Category: Wierenga, R.K.]]
[[Category: Wierenga RK]]
[[Category: isomerase(intramolecular oxidoreductase)]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 21:40:27 2007''

Latest revision as of 10:48, 14 February 2024

LARGE SCALE STRUCTURAL REARRANGEMENTS OF THE FRONT LOOPS IN MONOMERISED TRIOSEPHOSPHATE ISOMERASE, AS DEDUCED FROM THE COMPARISON OF THE STRUCTURAL PROPERTIES OF MONOTIM AND ITS POINT MUTATION VARIANT MONOSSLARGE SCALE STRUCTURAL REARRANGEMENTS OF THE FRONT LOOPS IN MONOMERISED TRIOSEPHOSPHATE ISOMERASE, AS DEDUCED FROM THE COMPARISON OF THE STRUCTURAL PROPERTIES OF MONOTIM AND ITS POINT MUTATION VARIANT MONOSS

Structural highlights

1mss is a 2 chain structure with sequence from Trypanosoma brucei brucei. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.4Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

TPIS_TRYBB

Evolutionary Conservation

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

See Also

1mss, resolution 2.40Å

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

OCA
Retrieved from "https://proteopedia.openfox.io/wiki/index.php?title=1mss&oldid=4051840"