2mtn

From Proteopedia

(Difference between revisions)

Revision as of 00:19, 26 January 2017

Solution structure of MLL-IBD complex

Structural highlights

2mtn is a 1 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Activity:	Histone-lysine N-methyltransferase, with EC number 2.1.1.43
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[KMT2A_HUMAN] Acute myeloid leukemia with 11q23 abnormalities;Precursor B-cell acute lymphoblastic leukemia;Wiedemann-Steiner syndrome;Acute biphenotypic leukemia;Acute undifferentiated leukemia;Bilineal acute leukemia. The disease is caused by mutations affecting the gene represented in this entry. Chromosomal aberrations involving KMT2A are a cause of acute leukemias. Translocation t(1;11)(q21;q23) with MLLT11/AF1Q; translocation t(3;11)(p21;q23) with NCKIPSD/AF3p21; translocation t(3,11)(q25,q23) with GMPS; translocation t(4;11)(q21;q23) with AFF1/MLLT2/AF4; insertion ins(5;11)(q31;q13q23) with AFF4/AF5Q31; translocation t(5;11)(q12;q23) with AF5-alpha/CENPK; translocation t(6;11)(q27;q23) with MLLT4/AF6; translocation t(9;11)(p22;q23) with MLLT3/AF9; translocation t(10;11)(p11.2;q23) with ABI1; translocation t(10;11)(p12;q23) with MLLT10/AF10; t(11;15)(q23;q14) with CASC5 and ZFYVE19; translocation t(11;17)(q23;q21) with MLLT6/AF17; translocation t(11;19)(q23;p13.3) with ELL; translocation t(11;19)(q23;p13.3) with MLLT1/ENL; translocation t(11;19)(q23;p23) with GAS7; translocation t(X;11)(q13;q23) with FOXO4/AFX1. Translocation t(3;11)(q28;q23) with LPP. Translocation t(10;11)(q22;q23) with TET1. Translocation t(9;11)(q34;q23) with DAB2IP. Translocation t(4;11)(p12;q23) with FRYL. Fusion proteins KMT2A-MLLT1, KMT2A-MLLT3 and KMT2A-ELL interact with PPP1R15A and, on the contrary to unfused KMT2A, inhibit PPP1R15A-induced apoptosis. A chromosomal aberration involving KMT2A may be a cause of chronic neutrophilic leukemia. Translocation t(4;11)(q21;q23) with SEPT11.

Function

[KMT2A_HUMAN] Histone methyltransferase that plays an essential role in early development and hematopoiesis. Catalytic subunit of the MLL1/MLL complex, a multiprotein complex that mediates both methylation of 'Lys-4' of histone H3 (H3K4me) complex and acetylation of 'Lys-16' of histone H4 (H4K16ac). In the MLL1/MLL complex, it specifically mediates H3K4me, a specific tag for epigenetic transcriptional activation. Has weak methyltransferase activity by itself, and requires other component of the MLL1/MLL complex to obtain full methyltransferase activity. Has no activity toward histone H3 phosphorylated on 'Thr-3', less activity toward H3 dimethylated on 'Arg-8' or 'Lys-9', while it has higher activity toward H3 acetylated on 'Lys-9'. Required for transcriptional activation of HOXA9. Promotes PPP1R15A-induced apoptosis.^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Lens epithelium-derived growth factor (LEDGF) is a chromatin associated protein implicated in leukemia and HIV-1 infection. LEDGF associates with MLL fusion proteins and menin and is required for leukemic transformation. To better understand the molecular mechanism underlying the LEDGF IBD domain interaction with MLL fusion proteins in leukemia we determined the solution structure of the MLL-IBD complex. We found a novel MLL motif, IBM2 (Integrase Binding Motif 2), which binds to a well-defined site on IBD. Point mutations within IBM2 abolished leukemogenic transformation by MLL-AF9, validating that this newly identified motif is essential for the oncogenic activity of MLL fusion proteins. Interestingly, the IBM2 binding site on IBD overlaps with the binding site for the HIV integrase (IN) and IN was capable to efficiently sequester IBD from the menin-MLL complex. A short IBM2 peptide binds to the IBD domain directly and inhibits both the IBD-MLL/menin and IBD-IN interactions. Our findings show that the same site on IBD is involved in binding to MLL and HIV integrase, revealing an attractive approach to simultaneously target LEDGF in leukemia and HIV.

The same site on LEDGF IBD domain represents therapeutic target for MLL leukemia and HIV.,Murai MJ, Pollock J, He S, Miao H, Purohit T, Yokom A, Hess JL, Muntean AG, Grembecka J, Cierpicki T Blood. 2014 Oct 10. pii: blood-2014-01-550079. PMID:25305204^[5]

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

References

↑ Adler HT, Chinery R, Wu DY, Kussick SJ, Payne JM, Fornace AJ Jr, Tkachuk DC. Leukemic HRX fusion proteins inhibit GADD34-induced apoptosis and associate with the GADD34 and hSNF5/INI1 proteins. Mol Cell Biol. 1999 Oct;19(10):7050-60. PMID:10490642
↑ Nakamura T, Mori T, Tada S, Krajewski W, Rozovskaia T, Wassell R, Dubois G, Mazo A, Croce CM, Canaani E. ALL-1 is a histone methyltransferase that assembles a supercomplex of proteins involved in transcriptional regulation. Mol Cell. 2002 Nov;10(5):1119-28. PMID:12453419
↑ Dou Y, Milne TA, Tackett AJ, Smith ER, Fukuda A, Wysocka J, Allis CD, Chait BT, Hess JL, Roeder RG. Physical association and coordinate function of the H3 K4 methyltransferase MLL1 and the H4 K16 acetyltransferase MOF. Cell. 2005 Jun 17;121(6):873-85. PMID:15960975 doi:10.1016/j.cell.2005.04.031
↑ Patel A, Dharmarajan V, Vought VE, Cosgrove MS. On the mechanism of multiple lysine methylation by the human mixed lineage leukemia protein-1 (MLL1) core complex. J Biol Chem. 2009 Sep 4;284(36):24242-56. Epub 2009 Jun 25. PMID:19556245 doi:M109.014498
↑ Murai MJ, Pollock J, He S, Miao H, Purohit T, Yokom A, Hess JL, Muntean AG, Grembecka J, Cierpicki T. The same site on LEDGF IBD domain represents therapeutic target for MLL leukemia and HIV. Blood. 2014 Oct 10. pii: blood-2014-01-550079. PMID:25305204 doi:http://dx.doi.org/10.1182/blood-2014-01-550079

1 Structural highlights
2 Disease
3 Function
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/2mtn"

@@ Line 1: / Line 1: @@
 ==Solution structure of MLL-IBD complex==
 <StructureSection load='2mtn' size='340' side='right' caption='[[2mtn]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
@@ Line 4: / Line 5: @@
 <table><tr><td colspan='2'>[[2mtn]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2MTN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2MTN FirstGlance]. <br>
 </td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histone-lysine_N-methyltransferase Histone-lysine N-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.43 2.1.1.43] </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=2mtn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2mtn OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2mtn RCSB], [http://www.ebi.ac.uk/pdbsum/2mtn 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=2mtn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2mtn OCA], [http://pdbe.org/2mtn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2mtn RCSB], [http://www.ebi.ac.uk/pdbsum/2mtn PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2mtn ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2mtn" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

2mtn

From Proteopedia

Revision as of 00:19, 26 January 2017

Solution structure of MLL-IBD complex

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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