Molecular Target Synopsis
Domains and Structures
Drugs and Clinical Candidates
Ligand Efficiency Plot
Family Cladogram
Interaction Network
Gene Expression
Gene Copy Number Variation
Germline Genetics

PBX1 (P40424) - Overview - Molecular Target Synopsis


PBX1, Pre-B-cell leukemia transcription factor 1
UniProt P40424

Also Known as PBX1_HUMAN, PBX1, PRL

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. Acts as a transcriptional activator of NKX2-5 and a transcriptional repressor of CDKN2B. Together with NKX2-5, it is required for spleen development through a mechanism that involves CDKN2B repression. Forms a heterodimer with MEIS1 which binds DNA including a cAMP-responsive sequence in CYP17. Also forms heterotrimers with MEIS1 and a number of HOX proteins including HOXA9, HOXD4, HOXD9 and HOXD10. Interacts with PBXIP1 and TLX1. Isoform PBX1a interacts with MEIS2 isoform 4, SP1, SP3 and KLF4. Isoform PBX1b is part of a PDX1:PBX1b:MEIS2b complex; PBX1b recruits Meis2B to the complex. Interacts with FOXC1 (PubMed:15684392).

Inspect Structure
See all 3D Structures for PBX1

Isoforms / Transcripts (Protein Coding)

Sub-cellular localization

UniProt: PBX1 is active in the following subcellular-locations: nucleus.
GO terms: PBX1 is active in the following subcellular-locations: cytoplasm, nucleoplasm, nucleus, RNA polymerase II transcription factor complex.

GO terms

Gene Copy Number Variation

In COSMIC - Cell Lines Project PBX1 has gain in 1 cell-lines, loss in 0 cell-lines and no signal in 1004 cell-lines. (see details)

Gene Expression

In NCI60, the highest expressing cell lines are: T47D, NCI_H460, A498

In Array Express (RNA-seq of 675 commonly used human cancer cell lines), the highest expressing cell lines are: NCI-H2804, NCI-H226, G112

In Array Express (RNA-seq of long poly adenylated RNA and long non poly adenylated RNA from ENCODE cell lines), the highest expressing cell lines are: NHLF, AG445, BJ

(see details)

3D Structures

For PBX1 there are:
2 structures (2 chains) solved
0 are solved in complex with at least one small molecule ligand

(see details)
Molecular Target 3D Synopsis

Screening and Chemistry

PBX1 has been screened with compounds ( bioactivities). (see details)