P40424 (PBX1_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 141.
History...
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Pre-B-cell leukemia transcription factor 1 Alternative name(s): Homeobox protein PBX1 Homeobox protein PRL | ||||
| Gene names |
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| Organism | Homo sapiens (Human) [Reference proteome] | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 430 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | 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. Ref.11 Ref.15 |
| Subunit structure | 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. Ref.10 Ref.11 Ref.12 Ref.13 Ref.15 |
| Subcellular location | Nucleus By similarity. |
| Tissue specificity | Expressed in all tissues except in cells of the B and T lineage. |
| Involvement in disease | 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. |
| Sequence similarities | Belongs to the TALE/PBX homeobox family. Contains 1 homeobox DNA-binding domain. |
| Sequence caution | The sequence AAA36764.1 differs from that shown. Reason: Erroneous initiation. Translation N-terminally shortened. |
Ontologies
Binary interactions
With | Entry | #Exp. | IntAct | Notes |
|---|---|---|---|---|
| FOXC1 | Q12948 | 4 | EBI-301611,EBI-1175253 | |
| TLX1 | P31314 | 2 | EBI-6390251,EBI-2820655 |
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform PBX1a (identifier: P40424-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform PBX1b (identifier: P40424-2) The sequence of this isoform differs from the canonical sequence as follows: 334-347: SSSSFNMSNSGDLF → GYPSPCYQPDRRIQ 348-430: Missing. | ||||||
| Isoform 3 (identifier: P40424-3) The sequence of this isoform differs from the canonical sequence as follows: 401-430: ANGGWQDATTPSSVTSPTEGPGSVHSDTSN → HLPRHPRQAHYHFRLPTWHP | ||||||
| Note: No experimental confirmation available. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||||||||||
Molecule processing | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 430 | 430 | Pre-B-cell leukemia transcription factor 1 | PRO_0000049235 | |||||||||||||||
Regions | |||||||||||||||||||
| DNA binding | 233 – 295 | 63 | Homeobox; TALE-type | ||||||||||||||||
| Compositional bias | 127 – 135 | 9 | Poly-Ala | ||||||||||||||||
Sites | |||||||||||||||||||
| Site | 88 – 89 | 2 | Breakpoint for translocation to form TCF3-PBX1 oncogene | ||||||||||||||||
Natural variations | |||||||||||||||||||
| Alternative sequence | 334 – 347 | 14 | SSSSF…SGDLF → GYPSPCYQPDRRIQ in isoform PBX1b. | VSP_002271 | |||||||||||||||
| Alternative sequence | 348 – 430 | 83 | Missing in isoform PBX1b. | VSP_002272 | |||||||||||||||
| Alternative sequence | 401 – 430 | 30 | ANGGW…SDTSN → HLPRHPRQAHYHFRLPTWHP in isoform 3. | VSP_044499 | |||||||||||||||
| Natural variant | 31 | 1 | G → S. Ref.3 Corresponds to variant rs2275558 [ dbSNP | Ensembl ]. | VAR_068904 | |||||||||||||||
Experimental info | |||||||||||||||||||
| Sequence conflict | 351 | 1 | Q → H in BAG61583. Ref.3 | ||||||||||||||||
Secondary structure | |||||||||||||||||||
Helix Strand Turn | |||||||||||||||||||
| Helix | 242 – 254 | 13 | |||||||||||||||||
| Turn | 255 – 257 | 3 | |||||||||||||||||
| Helix | 263 – 273 | 11 | |||||||||||||||||
| Helix | 277 – 293 | 17 | |||||||||||||||||
| Turn | 295 – 300 | 6 | |||||||||||||||||
| Helix | 301 – 304 | 4 | |||||||||||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "PBX2 and PBX3, new homeobox genes with extensive homology to the human proto-oncogene PBX1." Monica K., Galili N., Nourse J., Saltman D., Cleary M.L. Mol. Cell. Biol. 11:6149-6157(1991) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM PBX1A). |
| [2] | "Analysis of PBX1 as a candidate gene for type 2 diabetes mellitus in Pima Indians." Thameem F., Wolford J.K., Bogardus C., Prochazka M. Biochim. Biophys. Acta 1518:215-220(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] (ISOFORM PBX1A). |
| [3] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 3), VARIANT SER-31. Tissue: Brain. |
| [4] | "The DNA sequence and biological annotation of human chromosome 1." Gregory S.G., Barlow K.F., McLay K.E., Kaul R., Swarbreck D., Dunham A., Scott C.E., Howe K.L., Woodfine K., Spencer C.C.A., Jones M.C., Gillson C., Searle S., Zhou Y., Kokocinski F., McDonald L., Evans R., Phillips K. Bentley D.R.Nature 441:315-321(2006) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [5] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM PBX1A). Tissue: Brain. |
| [6] | "A new homeobox gene contributes the DNA binding domain of the t(1;19) translocation protein in pre-B ALL." Kamps M.P., Murre C., Sun X.-H., Baltimore D. Cell 60:547-555(1990) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 89-430, CHROMOSOMAL TRANSLOCATION WITH TCF3. |
| [7] | "The t(1;19)(q23;p13) results in consistent fusion of E2A and PBX1 coding sequences in acute lymphoblastic leukemias." Hunger S.P., Galili N., Carroll A.J., Crist W.M., Link M.P., Cleary M.L. Blood 77:687-693(1991) [PubMed] [Europe PMC] [Abstract] Cited for: CHROMOSOMAL TRANSLOCATION WITH TCF3. |
| [8] | "Pbx1 is converted into a transcriptional activator upon acquiring the N-terminal region of E2A in pre-B-cell acute lymphoblastoid leukemia." van Dijk M.A., Voorhoeve P.M., Murre C. Proc. Natl. Acad. Sci. U.S.A. 90:6061-6065(1993) [PubMed] [Europe PMC] [Abstract] Cited for: CHARACTERIZATION. |
| [9] | "Fusion with E2A converts the Pbx1 homeodomain protein into a constitutive transcriptional activator in human leukemias carrying the t(1;19) translocation." Lu Q., Wright D.D., Kamps M.P. Mol. Cell. Biol. 14:3938-3948(1994) [PubMed] [Europe PMC] [Abstract] Cited for: CHARACTERIZATION. |
| [10] | "Functional cloning and characterization of a novel nonhomeodomain protein that inhibits the binding of PBX1-HOX complexes to DNA." Abramovich C., Shen W.-F., Pineault N., Imren S., Montpetit B., Largman C., Humphries R.K. J. Biol. Chem. 275:26172-26177(2000) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH PBXIP1. |
| [11] | "Homeodomain proteins MEIS1 and PBXs regulate the lineage-specific transcription of the platelet factor 4 gene." Okada Y., Nagai R., Sato T., Matsuura E., Minami T., Morita I., Doi T. Blood 101:4748-4756(2003) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, INTERACTION WITH MEIS1. |
| [12] | "An autoinhibitory effect of the homothorax domain of Meis2." Hyman-Walsh C., Bjerke G.A., Wotton D. FEBS J. 277:2584-2597(2010) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH MEIS2. |
| [13] | "MEIS proteins as partners of the TLX1/HOX11 oncoprotein." Milech N., Gottardo N.G., Ford J., D'Souza D., Greene W.K., Kees U.R., Watt P.M. Leuk. Res. 34:358-363(2010) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH TLX1. |
| [14] | "Initial characterization of the human central proteome." Burkard T.R., Planyavsky M., Kaupe I., Breitwieser F.P., Buerckstuemmer T., Bennett K.L., Superti-Furga G., Colinge J. BMC Syst. Biol. 5:17-17(2011) [PubMed] [Europe PMC] [Abstract] Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]. |
| [15] | "Cooperative transcriptional activation by Klf4, Meis2, and Pbx1." Bjerke G.A., Hyman-Walsh C., Wotton D. Mol. Cell. Biol. 31:3723-3733(2011) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, INTERACTION WITH SP1; SP3 AND KLF4. |
| [16] | "Structure of a HoxB1-Pbx1 heterodimer bound to DNA: role of the hexapeptide and a fourth homeodomain helix in complex formation." Piper D.E., Batchelor A.H., Chang C.-P., Cleary M.L., Wolberger C. Cell 96:587-597(1999) [PubMed] [Europe PMC] [Abstract] Cited for: X-RAY CRYSTALLOGRAPHY (2.35 ANGSTROMS) OF 233-319 IN COMPLEX WITH HOXB1. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EMBL GenBank DDBJ | M86546 mRNA. Translation: AAA60031.1. AF313404 AF313403 Genomic DNA. Translation: AAG30941.1.AK299673 mRNA. Translation: BAG61583.1. AL359255, AL357568, AL390119 Genomic DNA. Translation: CAI14854.1. AL390119, AL359255, AL357568 Genomic DNA. Translation: CAH73499.1. AL357568, AL390119, AL359255 Genomic DNA. Translation: CAI14908.1. AL391001 Genomic DNA. No translation available. BC101578 mRNA. Translation: AAI01579.1. M31522 mRNA. Translation: AAA36764.1. Different initiation. | ||||||||||||||||||
| IPI | IPI00028415. IPI00215683. IPI01009062. | ||||||||||||||||||
| PIR | B34734. | ||||||||||||||||||
| RefSeq | NP_001191892.1. NM_001204963.1. NP_002576.1. NM_002585.3. | ||||||||||||||||||
| UniGene | Hs.557097. | ||||||||||||||||||
3D structure databases | |||||||||||||||||||
| PDBe RCSB PDB PDBj |
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| ProteinModelPortal | P40424. | ||||||||||||||||||
| ModBase | Search... | ||||||||||||||||||
Protein-protein interaction databases | |||||||||||||||||||
| IntAct | P40424. 6 interactions. | ||||||||||||||||||
| STRING | 9606.ENSP00000405890. | ||||||||||||||||||
PTM databases | |||||||||||||||||||
| PhosphoSite | P40424. | ||||||||||||||||||
Polymorphism databases | |||||||||||||||||||
| DMDM | 730279. | ||||||||||||||||||
Proteomic databases | |||||||||||||||||||
| PaxDb | P40424. | ||||||||||||||||||
| PRIDE | P40424. | ||||||||||||||||||
Protocols and materials databases | |||||||||||||||||||
| DNASU | 5087. | ||||||||||||||||||
| StructuralBiologyKnowledgebase | Search... | ||||||||||||||||||
Genome annotation databases | |||||||||||||||||||
| Ensembl | ENST00000367897; ENSP00000356872; ENSG00000185630. ENST00000401534; ENSP00000384856; ENSG00000185630. ENST00000420696; ENSP00000405890; ENSG00000185630. ENST00000540236; ENSP00000439943; ENSG00000185630. | ||||||||||||||||||
| GeneID | 5087. | ||||||||||||||||||
| KEGG | hsa:5087. | ||||||||||||||||||
| UCSC | uc001gct.3. human. | ||||||||||||||||||
Organism-specific databases | |||||||||||||||||||
| CTD | 5087. | ||||||||||||||||||
| GeneCards | GC01P164524. | ||||||||||||||||||
| HGNC | HGNC:8632. PBX1. | ||||||||||||||||||
| HPA | CAB018768. HPA003505. HPA003881. | ||||||||||||||||||
| MIM | 176310. gene. | ||||||||||||||||||
| neXtProt | NX_P40424. | ||||||||||||||||||
| Orphanet | 99860. Precursor B-cell acute lymphoblastic leukemia. | ||||||||||||||||||
| PharmGKB | PA32970. | ||||||||||||||||||
| GenAtlas | Search... | ||||||||||||||||||
Phylogenomic databases | |||||||||||||||||||
| eggNOG | NOG248144. | ||||||||||||||||||
| HOGENOM | HOG000266972. | ||||||||||||||||||
| HOVERGEN | HBG000122. | ||||||||||||||||||
| InParanoid | P40424. | ||||||||||||||||||
| KO | K09355. | ||||||||||||||||||
| OMA | NIQSQVD. | ||||||||||||||||||
| OrthoDB | EOG45HRXQ. | ||||||||||||||||||
| PhylomeDB | P40424. | ||||||||||||||||||
Gene expression databases | |||||||||||||||||||
| ArrayExpress | P40424. | ||||||||||||||||||
| Bgee | P40424. | ||||||||||||||||||
| CleanEx | HS_PBX1. HS_PRL. | ||||||||||||||||||
| Genevestigator | P40424. | ||||||||||||||||||
| GermOnline | ENSG00000185630. Homo sapiens. | ||||||||||||||||||
Family and domain databases | |||||||||||||||||||
| Gene3D | 1.10.10.60. 1 hit. | ||||||||||||||||||
| InterPro | IPR017970. Homeobox_CS. IPR001356. Homeodomain. IPR009057. Homeodomain-like. IPR005542. PBX. [Graphical view] | ||||||||||||||||||
| Pfam | PF00046. Homeobox. 1 hit. PF03792. PBC. 1 hit. [Graphical view] | ||||||||||||||||||
| SMART | SM00389. HOX. 1 hit. [Graphical view] | ||||||||||||||||||
| SUPFAM | SSF46689. Homeodomain_like. 1 hit. | ||||||||||||||||||
| PROSITE | PS00027. HOMEOBOX_1. 1 hit. PS50071. HOMEOBOX_2. 1 hit. [Graphical view] | ||||||||||||||||||
| ProtoNet | Search... | ||||||||||||||||||
Other | |||||||||||||||||||
| BindingDB | P40424. | ||||||||||||||||||
| ChEMBL | CHEMBL4587. | ||||||||||||||||||
| ChiTaRS | PBX1. human. | ||||||||||||||||||
| EvolutionaryTrace | P40424. | ||||||||||||||||||
| GenomeRNAi | 5087. | ||||||||||||||||||
| NextBio | 19618. | ||||||||||||||||||
| SOURCE | Search... | ||||||||||||||||||
Entry information
| Entry name | PBX1_HUMAN | ||||||||
| Accession | Primary (citable) accession number: P40424 Secondary accession number(s): B4DSC1, F5H4U9, Q5T488 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 1 Human chromosome 1: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| PDB cross-references Index of Protein Data Bank (PDB) cross-references |
| SIMILARITY comments Index of protein domains and families |

Clusters with
