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Title: Structural Basis for Dimerization and DNA Binding of Transcription Factor FLI1

Journal Article · · Biochemistry
 [1];  [1]
  1. Univ. of Kentucky, Lexington, KY (United States)

FLI1 (Friend leukemia integration 1) is a metazoan transcription factor that is upregulated in a number of cancers. Additionally, rearrangements of the fli1 gene cause sarcomas, leukemias, and lymphomas. These rearrangements encode oncogenic transcription factors, in which the DNA binding domain (DBD or ETS domain) of FLI1 on the C-terminal side is fused to a part of an another protein on the N-terminal side. Such abnormal cancer cell-specific fusions retain the DNA binding properties of FLI1 and acquire non-native protein–protein or protein–nucleic acid interactions of the substituted region. As a result, these fusions trigger oncogenic transcriptional reprogramming of the host cell. Interactions of FLI1 fusions with other proteins and with itself play a critical role in the oncogenic regulatory functions, and they are currently under intense scrutiny, mechanistically and as potential novel anticancer drug targets. We report elusive crystal structures of the FLI1 DBD, alone and in complex with cognate DNA containing a GGAA recognition sequence. Both structures reveal a previously unrecognized dimer of this domain, consistent with its dimerization in solution. The homodimerization interface is helix-swapped and dominated by hydrophobic interactions, including those between two interlocking Phe362 residues. A mutation of Phe362 to an alanine disrupted the propensity of this domain to dimerize without perturbing its structure or the DNA binding function, consistent with the structural observations. We propose that FLI1 DBD dimerization plays a role in transcriptional activation and repression by FLI1 and its fusions at promoters containing multiple FLI1 binding sites.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
University of Kentucky; USDOE
OSTI ID:
1237759
Journal Information:
Biochemistry, Vol. 54, Issue 50; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (53)

Refinement of Macromolecular Structures by the Maximum-Likelihood Method journal May 1997
Physical properties of DNA in vivo as probed by the length dependence of the lac operator looping process journal May 1988
The Structural and Dynamic Basis of Ets-1 DNA Binding Autoinhibition journal February 2005
Structures of the Ets Protein DNA-binding Domains of Transcription Factors Etv1, Etv4, Etv5, and Fev journal May 2015
Pet-1 ETS Gene Plays a Critical Role in 5-HT Neuron Development and Is Required for Normal Anxiety-like and Aggressive Behavior journal January 2003
Fli1 Represses Transcription of the Human α2(I) Collagen Gene by Recruitment of the HDAC1/p300 Complex journal September 2013
Paris-Trousseau thrombocytopenia is phenocopied by the autosomal recessive inheritance of a DNA-binding domain mutation in FLI1 journal October 2015
Structural and dynamic studies of the transcription factor ERG reveal DNA binding is allosterically autoinhibited journal July 2013
EWS-erg and EWS-Fli1 fusion transcripts in Ewing's sarcoma and primitive neuroectodermal tumors with variant translocations. journal August 1994
Identification of an Inhibitor of the EWS-FLI1 Oncogenic Transcription Factor by High-Throughput Screening journal June 2011
Etv2 and Fli1b Function Together as Key Regulators of Vasculogenesis and Angiogenesis journal April 2015
Expression of Variant TMPRSS2/ERG Fusion Messenger RNAs Is Associated with Aggressive Prostate Cancer journal September 2006
Structural basis of Ets1 activation by Runx1 journal March 2014
Gene fusion with an ETS DNA-binding domain caused by chromosome translocation in human tumours journal September 1992
Erg proteins, transcription factors of the Ets family, form homo, heterodimers and ternary complexes via two distinct domains journal June 1998
Crystal structure of a ternary SAP-1/SRF/ c-fos SRE DNA complex 1 1Edited by K. Morikawa journal November 2001
Microsatellites as EWS/FLI response elements in Ewing's sarcoma journal July 2008
Hexameric ring structure of the N-terminal domain of Mycobacterium tuberculosis DnaB helicase: Mycobacterium tuberculosis DnaB helicase journal May 2008
Dimer formation and conformational flexibility ensure cytoplasmic stability and nuclear accumulation of Elk-1 journal May 2011
TEThered to Runx: Novel binding partners for runx factors journal June 2010
Structural Studies of Ets-1/Pax5 Complex Formation on DNA journal December 2001
Synthesis and Structure–Activity Relationship Studies of Small Molecule Disruptors of EWS-FLI1 Interactions in Ewing’s Sarcoma journal December 2014
Convergence of Ets- and notch-related structural motifs in a heteromeric DNA binding complex journal August 1991
A small molecule blocking oncogenic protein EWS-FLI1 interaction with RNA helicase A inhibits growth of Ewing's sarcoma journal July 2009
Differentiation-Dependent Interactions between RUNX-1 and FLI-1 during Megakaryocyte Development journal May 2009
Divergent Ewing's sarcoma EWS/ETS fusions confer a common tumorigenic phenotype on NIH3T3 cells journal September 1999
Novel computer program for fast exact calculation of accessible and molecular surface areas and average surface curvature journal April 2002
An approach to crystallizing proteins by metal-mediated synthetic symmetrization journal September 2011
Identification and mapping of a common proviral integration site Fli-1 in erythroleukemia cells induced by Friend murine leukemia virus. journal February 1990
FLI1 Expression is Correlated with Breast Cancer Cellular Growth, Migration, and Invasion and Altered Gene Expression journal October 2014
Ewing sarcoma 11;22 translocation produces a chimeric transcription factor that requires the DNA-binding domain encoded by FLI1 for transformation. journal June 1993
3DNA: a software package for the analysis, rebuilding and visualization of three-dimensional nucleic acid structures journal September 2003
Structural Basis of Ets1 Cooperative Binding to Widely Separated Sites on Promoter DNA journal March 2012
The ETS Domain Factor Pet-1 Is an Early and Precise Marker of Central Serotonin Neurons and Interacts with a Conserved Element in Serotonergic Genes journal December 1999
Coot model-building tools for molecular graphics journal November 2004
Homotypic and heterotypic interactions of EWS, FLI1 and their oncogenic fusion protein journal October 2003
Recent advances in the structural molecular biology of Ets transcription factors: interactions, interfaces and inhibition journal January 2014
Continuous Fli-1 expression plays an essential role in the proliferation and survival of F-MuLV-induced erythroleukemia and human erythroleukemia journal March 2009
Structure validation by Cα geometry: ϕ,ψ and Cβ deviation journal January 2003
Oncogenic EWS-Fli1 interacts with hsRPB7, a subunit of human RNA polymerase II journal August 1998
Solution structure of the ets domain of Fli-1 when bound to DNA journal December 1994
Upstream operators enhance repression of the lac promoter journal August 1986
Lmx1b, Pet-1 , and Nkx2.2 Coordinately Specify Serotonergic Neurotransmitter Phenotype journal November 2003
MOLREP an Automated Program for Molecular Replacement journal December 1997
Crystal structure and DNA binding functions of ERCC1, a subunit of the DNA structure-specific endonuclease XPF-ERCC1 journal August 2005
[20] Processing of X-ray diffraction data collected in oscillation mode book January 1997
Ets-dependent Regulation of Target Gene Expression during Megakaryopoiesis journal December 2004
TMPRSS2:ERG gene fusion associated with lethal prostate cancer in a watchful waiting cohort journal January 2007
The role of Fli-1 in normal cell function and malignant transformation journal December 2000
Phaser crystallographic software journal July 2007
Recurrent Fusion of TMPRSS2 and ETS Transcription Factor Genes in Prostate Cancer journal October 2005
Recombinant EWS-FLI1 Oncoprotein Activates Transcription journal October 2004
Dual requirement for the ETS transcription factors Fli-1 and Erg in hematopoietic stem cells and the megakaryocyte lineage journal July 2009

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