HSFB1 Antibody

Experimental Applications

HSFB1 antibodies are validated for multiple techniques:

• Western Blotting: Detects endogenous HSFB1 at ~57–85 kDa in heat-shocked HeLa, MCF7, and NIH/3T3 cell lysates .

• Immunofluorescence/Immunocytochemistry: Localizes HSFB1 in nuclear and cytoplasmic compartments under stress conditions .

• Chromatin Immunoprecipitation (ChIP): Identifies HSFB1 binding to heat shock elements (HSEs) in gene promoters .

• Functional Studies: Used to characterize HSFB1’s dual role as transcriptional repressor and co-activator in plant thermotolerance .

Regulatory Mechanisms in Stress Responses

• Co-activator Function: Tomato HSFB1 synergizes with HSFA1 to enhance heat shock protein (HSP) expression, improving thermotolerance .

• Repressor Activity: Suppresses non-essential HSFs (e.g., HSFA2) under non-stress conditions to balance growth and stress responses .

• Metabolome Modulation: Overexpression in tomato alters flavonoid biosynthesis and glycolytic pathways, enhancing recovery from heat stress .

Disease and Immunity Roles

• Pathogen Defense: Arabidopsis HSFB1 primes systemic acquired resistance (SAR) by regulating PAL1 and WRKY29 genes during bacterial infections .

• Thermotolerance Trade-offs: Constitutive HSFB1 activation in transgenic plants causes developmental defects but improves survival under heat stress .

Technical Considerations

• Activation-Dependent Detection: HSFB1 antibodies often show enhanced signal upon stress-induced trimerization .

• Buffer Compatibility: Sodium azide-free formulations (e.g., Thermo Fisher’s #4356) maintain stability for 36 months at -20°C .

• Controls Required: Use HSFB1-knockout lysates (e.g., mouse embryonic fibroblasts) to confirm specificity .