GFI1b Antibody

Description

Product Name GFI1b Antibody
Host Species Rabbit
Clonality Polyclonal
Purification Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide.
Applications WB
Species Reactivity Hu Ms Rt
Specificity The antibody detects endogenous level of total GFI1b protein.
Immunogen Type Peptide-KLH
Immunogen Description Peptide sequence around aa.322~326(H-R-E-S-Q) derived from Human GFI1b.
Target Name GFI1b
Alternative Names Gfi-1b
Accession No. Swiss-Prot: Q5VTD9
NCBI Protein: NP_001128503.1
Concentration 1.0mg/ml
Formulation Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Storage Store at -20°C for long term preservation (recommended). Store at 4°C for short term use.

Application Details

Predicted MW: 38kd
Western blotting: 1:500~1:1000

Images

Western blot analysis of extracts from Raji cells using GFI1b Antibody #AB21664.

Background

Essential proto-oncogenic transcriptional regulator necessary for development and differentiation of erythroid and megakaryocytic lineages. Transcriptional repressor or activator depending on both promoter and cell type context; represses promoter activity of SOCS1 and SOCS3 and thus, may regulate cytokine signaling pathways. Cooperates with GATA1 to repress target gene transcription, such as the apoptosis regulator BCL2L1; GFI1B silencing in leukemic cell lines markedly increase apoptosis rate. Inhibits down-regulation of MYC and MYB as well as the cyclin-dependent kinase inhibitor CDKN1A/P21WAF1 in IL6-treated myelomonocytic cells. Represses expression of GATA3 in T-cell lymphomas and inhibits GATA1-mediated transcription; as GATA1 also mediates erythroid GFI1B transcription, both GATA1 and GFI1B participate in a feedback regulatory pathway controlling the expression of GFI1B gene in erythroid cells. Suppresses GATA1-mediated stimulation of GFI1B promoter through protein interaction. Binds to gamma-satellite DNA and to its own promoter, auto-repressing its own expression. Alters histone methylation by recruiting histone methyltransferase to target genes promoters. Plays a role in heterochromatin formation.

Osawa M., Yamaguchi T., Nakamura Y. Iwama A.Blood 100:2769-2777(2002)
Huang D.-Y., Kuo Y.-Y., Chang Z.-F. Nucleic Acids Res. 33:5331-5342(2005)
Vassen L., Fiolka K., Moeroey T. EMBO J. 25:2409-2419(2006)

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