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2r9k

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Revision as of 18:11, 25 December 2014

Crystal Structure of Misteltoe Lectin I in Complex with Phloretamide

Structural highlights

2r9k is a 2 chain structure with sequence from Viscum album. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , ,
Related:	1m2t
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[ML1_VISAL] The A chain is responsible for inhibiting protein synthesis through the catalytic inactivation of 60S ribosomal subunits by removing adenine from position 4,324 of 28S rRNA. The B chain binds to cell receptors and probably facilitates the entry into the cell of the A chain; B chains are also responsible for cell agglutination (lectin activity). Inhibits growth of the human tumor cell line Molt4.^[1] ^[2] ^[3]

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 X-ray structure at 2.7A resolution of the complex between the European mistletoe lectin I (Viscum album, ML-I) and the plant growth hormone, 3-(p-hydroxyphenyl)-propionic acid amide (phloretamide, PA) from xylem sap has revealed the binding of PA at the so far undescribed hydrophobic cavity located between the two subunits of this ribosome-inhibiting protein. No such cavity is observed in related lectins. The binding of PA is achieved through interactions with the non-conserved residues Val228A, Leu230A, Arg388B, and the C-terminal Pro510B. It is conceivable that binding of PA to ML-I is part of a defence mechanism of the parasite against the host, whereby the parasite prevents the growth hormone of the host from interfering with its own regulatory system. The specific binding of PA to ML-I indicates that heterodimeric RIPs are multifunctional proteins whose functions in the cell have not yet been fully recognized and analyzed.

The mistletoe lectin I--phloretamide structure reveals a new function of plant lectins.,Meyer A, Rypniewski W, Celewicz L, Erdmann VA, Voelter W, Singh TP, Genov N, Barciszewski J, Betzel Ch Biochem Biophys Res Commun. 2007 Dec 14;364(2):195-200. Epub 2007 Oct 5. PMID:17937929^[4]

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

References

↑ Kourmanova AG, Soudarkina OJ, Olsnes S, Kozlov JV. Cloning and characterization of the genes encoding toxic lectins in mistletoe (Viscum album L). Eur J Biochem. 2004 Jun;271(12):2350-60. PMID:15182350 doi:http://dx.doi.org/10.1111/j.1432-1033.2004.04153.x
↑ Mishra V, Sharma RS, Yadav S, Babu CR, Singh TP. Purification and characterization of four isoforms of Himalayan mistletoe ribosome-inactivating protein from Viscum album having unique sugar affinity. Arch Biochem Biophys. 2004 Mar 15;423(2):288-301. PMID:15001393 doi:http://dx.doi.org/10.1016/j.abb.2003.12.033
↑ Dietrich JB, Ribereau-Gayon G, Jung ML, Franz H, Beck JP, Anton R. Identity of the N-terminal sequences of the three A chains of mistletoe (Viscum album L.) lectins: homology with ricin-like plant toxins and single-chain ribosome-inhibiting proteins. Anticancer Drugs. 1992 Oct;3(5):507-11. PMID:1450445
↑ Meyer A, Rypniewski W, Celewicz L, Erdmann VA, Voelter W, Singh TP, Genov N, Barciszewski J, Betzel Ch. The mistletoe lectin I--phloretamide structure reveals a new function of plant lectins. Biochem Biophys Res Commun. 2007 Dec 14;364(2):195-200. Epub 2007 Oct 5. PMID:17937929 doi:10.1016/j.bbrc.2007.09.113

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2r9k"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2r9k]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Viscum_album Viscum album]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2R9K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2R9K FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SGI:3-(4-HYDROXYPHENYL)PROPANAMIDE'>SGI</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SGI:3-(4-HYDROXYPHENYL)PROPANAMIDE'>SGI</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1m2t|1m2t]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1m2t|1m2t]]</td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2r9k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2r9k OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2r9k RCSB], [http://www.ebi.ac.uk/pdbsum/2r9k 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=2r9k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2r9k OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2r9k RCSB], [http://www.ebi.ac.uk/pdbsum/2r9k PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/ML1_VISAL ML1_VISAL]] The A chain is responsible for inhibiting protein synthesis through the catalytic inactivation of 60S ribosomal subunits by removing adenine from position 4,324 of 28S rRNA. The B chain binds to cell receptors and probably facilitates the entry into the cell of the A chain; B chains are also responsible for cell agglutination (lectin activity). Inhibits growth of the human tumor cell line Molt4.<ref>PMID:15182350</ref> <ref>PMID:15001393</ref> <ref>PMID:1450445</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 30: / Line 32: @@
 </StructureSection>
 [[Category: Viscum album]]
-[[Category: Betzel, C.]]
+[[Category: Betzel, C]]
-[[Category: Celewicz, L.]]
+[[Category: Celewicz, L]]
-[[Category: Erdmann, V A.]]
+[[Category: Erdmann, V A]]
-[[Category: Meyer, A.]]
+[[Category: Meyer, A]]
-[[Category: Rypniewski, W.]]
+[[Category: Rypniewski, W]]
-[[Category: Voelter, W.]]
+[[Category: Voelter, W]]
 [[Category: Glycoprotein]]
 [[Category: Hydrolase]]
@@ Line 44: / Line 46: @@
 [[Category: Protein synthesis inhibitor]]
 [[Category: Toxin]]
-[[Category: Viscum album]]

2r9k

From Proteopedia

Revision as of 18:11, 25 December 2014

Crystal Structure of Misteltoe Lectin I in Complex with Phloretamide

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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