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1b72

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Revision as of 10:12, 18 November 2020

PBX1, HOMEOBOX PROTEIN HOX-B1/DNA TERNARY COMPLEX

Structural highlights

1b72 is a 4 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	HOXB-1 (HUMAN), PBX1 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[PBX1_HUMAN] Note=A chromosomal aberration involving PBX1 is a cause of pre-B-cell acute lymphoblastic leukemia (B-ALL). Translocation t(1;19)(q23;p13.3) with TCF3. TCF3-PBX1 transforms cells by constitutively activating transcription of genes regulated by PBX1 or by other members of the PBX protein family. [HXB1_HUMAN] Defects in HOXB1 are the cause of facial paresis, hereditary congenital, 3 (HCFP3) [MIM:614744]. A form of facial paresis, a disease characterized by isolated dysfunction of the facial nerve (CN VII). HCFP3 patients are affected by bilateral facial palsy, facial muscle weakness of muscles innervated by CN VII, hearing loss, and strabismus.^[1]

Function

[PBX1_HUMAN] Binds the sequence 5'-ATCAATCAA-3'. Acts as a transcriptional activator of PF4 in complex with MEIS1. Converted into a potent transcriptional activator by the (1;19) translocation. May have a role in steroidogenesis and, subsequently, sexual development and differentiation. Isoform PBX1b as part of a PDX1:PBX1b:MEIS2b complex in pancreatic acinar cells is involved in the transcriptional activation of the ELA1 enhancer; the complex binds to the enhancer B element and cooperates with the transcription factor 1 complex (PTF1) bound to the enhancer A element. Probably in complex with MEIS2, is involved in transcriptional regulation by KLF4.^[2] ^[3] [HXB1_HUMAN] Sequence-specific transcription factor which is part of a developmental regulatory system that provides cells with specific positional identities on the anterior-posterior axis. Acts on the anterior body structures.

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

Hox homeodomain proteins are developmental regulators that determine body plan in a variety of organisms. A majority of the vertebrate Hox proteins bind DNA as heterodimers with the Pbx1 homeodomain protein. We report here the 2.35 A structure of a ternary complex containing a human HoxB1-Pbx1 heterodimer bound to DNA. Heterodimer contacts are mediated by the hexapeptide of HoxB1, which binds in a pocket in the Pbx1 protein formed in part by a three-amino acid insertion in the Pbx1 homeodomain. The Pbx1 DNA-binding domain is larger than the canonical homeodomain, containing an additional alpha helix that appears to contribute to binding of the HoxB1 hexapeptide and to stable binding of Pbx1 to DNA. The structure suggests a model for modulation of Hox DNA binding activity by Pbx1 and related proteins.

Structure of a HoxB1-Pbx1 heterodimer bound to DNA: role of the hexapeptide and a fourth homeodomain helix in complex formation.,Piper DE, Batchelor AH, Chang CP, Cleary ML, Wolberger C Cell. 1999 Feb 19;96(4):587-97. PMID:10052460^[4]

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

References

↑ Webb BD, Shaaban S, Gaspar H, Cunha LF, Schubert CR, Hao K, Robson CD, Chan WM, Andrews C, MacKinnon S, Oystreck DT, Hunter DG, Iacovelli AJ, Ye X, Camminady A, Engle EC, Jabs EW. HOXB1 founder mutation in humans recapitulates the phenotype of Hoxb1-/- mice. Am J Hum Genet. 2012 Jul 13;91(1):171-9. doi: 10.1016/j.ajhg.2012.05.018. Epub, 2012 Jul 5. PMID:22770981 doi:10.1016/j.ajhg.2012.05.018
↑ Okada Y, Nagai R, Sato T, Matsuura E, Minami T, Morita I, Doi T. Homeodomain proteins MEIS1 and PBXs regulate the lineage-specific transcription of the platelet factor 4 gene. Blood. 2003 Jun 15;101(12):4748-56. Epub 2003 Feb 27. PMID:12609849 doi:10.1182/blood-2002-02-0380
↑ Bjerke GA, Hyman-Walsh C, Wotton D. Cooperative transcriptional activation by Klf4, Meis2, and Pbx1. Mol Cell Biol. 2011 Sep;31(18):3723-33. doi: 10.1128/MCB.01456-10. Epub 2011 Jul , 11. PMID:21746878 doi:10.1128/MCB.01456-10
↑ Piper DE, Batchelor AH, Chang CP, Cleary ML, Wolberger C. Structure of a HoxB1-Pbx1 heterodimer bound to DNA: role of the hexapeptide and a fourth homeodomain helix in complex formation. Cell. 1999 Feb 19;96(4):587-97. PMID:10052460

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 See Also
7 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1b72"

@@ Line 1: / Line 1: @@
 ==PBX1, HOMEOBOX PROTEIN HOX-B1/DNA TERNARY COMPLEX==
-<StructureSection load='1b72' size='340' side='right' caption='[[1b72]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
+<StructureSection load='1b72' size='340' side='right'caption='[[1b72]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1b72]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B72 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1B72 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1b72]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B72 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1B72 FirstGlance]. <br>
 </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HOXB-1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), PBX1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=1b72 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b72 OCA], [http://pdbe.org/1b72 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1b72 RCSB], [http://www.ebi.ac.uk/pdbsum/1b72 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1b72 ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1b72 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b72 OCA], [http://pdbe.org/1b72 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1b72 RCSB], [http://www.ebi.ac.uk/pdbsum/1b72 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1b72 ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 15: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b7/1b72_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b7/1b72_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 30: / Line 30: @@
 </div>
 <div class="pdbe-citations 1b72" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Hox protein|Hox protein]]
 == References ==
 <references/>
@@ Line 35: / Line 38: @@
 </StructureSection>
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Batchelor, A H]]
 [[Category: Chang, C P]]

1b72

From Proteopedia

Revision as of 10:12, 18 November 2020

PBX1, HOMEOBOX PROTEIN HOX-B1/DNA TERNARY COMPLEX

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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