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1y1n

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Revision as of 07:03, 18 April 2018

Identification of SH3 motif in M. Tuberculosis methionine aminopeptidase suggests a mode of interaction with the ribosome

Structural highlights

1y1n is a 1 chain structure with sequence from "bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	map, mapB ("Bacillus tuberculosis" (Zopf 1883) Klein 1884)
Activity:	Methionyl aminopeptidase, with EC number 3.4.11.18
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[AMPM2_MYCTU] Removes the N-terminal methionine from nascent proteins, when the penultimate amino acid is alanine or proline, but enzyme activity is remarkably low when the second residue is phenylalanine or leucine. With glycine at the second position, Map is more active with a tetrapeptide than with a tripeptide.^[1] ^[2]

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 crystal structure of the methionine aminopeptidase (MetAP) from Mycobacterium tuberculosis (MtMetAP1c) has been determined in the apo- and methionine-bound forms. This is the first structure of a type I MetAP with a significant extension at the amino terminus. The catalytic domain is similar to that of Escherichia coli MetAP (EcMetAP), and the additional 40-residue segment wraps around the surface with an extended but well-defined structure. There are several members of the actinomyces family of bacteria that contain MetAPs with such N-terminal extensions, and we classify these as MetAP type Ic (MetAP1c). Some members of this family of bacteria also contain a second MetAP (type Ia) similar in size to EcMetAP. The main difference between the apo- and the methionine-bound forms of MtMetAP1c is in the conformation of the metal-binding residues. The position of the methionine bound in the active site is very similar to that found in many of the known members of this family. Side chains of several residues in the S1 and S1' subsites shift as much as 1.5 A compared to EcMetAP. Residues 14-17 have the sequence Pro-Thr-Arg-Pro and adopt the conformation of a polyproline II helix. Model-building suggests that this PxxP segment can bind to an SH3 protein motif. Other type Ib and type Ic MetAPs with N-terminal extensions contain similarly located PxxP motifs. Also, several ribosomal proteins are known to include SH3 domains, one of which is located close to the tunnel from which the nascent polypeptide chain exits the ribosome. Therefore, it is proposed that the binding of MetAPs to the ribosome is mediated by a complex between a PxxP motif on the protein and an SH3 domain on the ribosome. It is also possible that zinc-finger domains, which are located at the extreme N-terminus of type I MetAPs, may participate in interactions with the ribosome.

Identification of an SH3-binding motif in a new class of methionine aminopeptidases from Mycobacterium tuberculosis suggests a mode of interaction with the ribosome.,Addlagatta A, Quillin ML, Omotoso O, Liu JO, Matthews BW Biochemistry. 2005 May 17;44(19):7166-74. PMID:15882055^[3]

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

References

↑ Zhang X, Chen S, Hu Z, Zhang L, Wang H. Expression and characterization of two functional methionine aminopeptidases from Mycobacterium tuberculosis H37Rv. Curr Microbiol. 2009 Nov;59(5):520-5. doi: 10.1007/s00284-009-9470-3. Epub 2009, Aug 18. PMID:19688379 doi:10.1007/s00284-009-9470-3
↑ Lu JP, Chai SC, Ye QZ. Catalysis and Inhibition of Mycobacterium tuberculosis Methionine Aminopeptidase. J Med Chem. 2009 Dec 28. PMID:20038112 doi:10.1021/jm901624n
↑ Addlagatta A, Quillin ML, Omotoso O, Liu JO, Matthews BW. Identification of an SH3-binding motif in a new class of methionine aminopeptidases from Mycobacterium tuberculosis suggests a mode of interaction with the ribosome. Biochemistry. 2005 May 17;44(19):7166-74. PMID:15882055 doi:10.1021/bi0501176

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/1y1n"

@@ Line 1: / Line 1: @@
 ==Identification of SH3 motif in M. Tuberculosis methionine aminopeptidase suggests a mode of interaction with the ribosome==
 <StructureSection load='1y1n' size='340' side='right' caption='[[1y1n]], [[Resolution|resolution]] 1.51&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">map, mapB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 "Bacillus tuberculosis" (Zopf 1883) Klein 1884])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Methionyl_aminopeptidase Methionyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.18 3.4.11.18] </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=1y1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y1n OCA], [http://pdbe.org/1y1n PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y1n RCSB], [http://www.ebi.ac.uk/pdbsum/1y1n 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=1y1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y1n OCA], [http://pdbe.org/1y1n PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y1n RCSB], [http://www.ebi.ac.uk/pdbsum/1y1n PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1y1n 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/y1/1y1n_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/y1/1y1n_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1y1n

From Proteopedia

Revision as of 07:03, 18 April 2018

Identification of SH3 motif in M. Tuberculosis methionine aminopeptidase suggests a mode of interaction with the ribosome

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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