Phospho-CDC25C (Thr48) antibodies are available in both polyclonal and monoclonal formats, produced by immunizing animals with synthetic phosphopeptides corresponding to residues surrounding Thr48 of human CDC25C. Key product specifications include:
CDC25C is a dual-specificity phosphatase essential for G2/M transition. Its activation requires phosphorylation at over 12 sites, including Thr48, which mediates interactions with:
Pin1 WW domain: Facilitates conformational changes via prolyl isomerization .
CKS/p13SUC1: Enhances substrate recognition .
Thr48 phosphorylation is tightly regulated during mitosis but becomes aberrant in diseases like FLT3-ITD-mutated acute myeloid leukemia (AML), where it correlates with disrupted cell cycle control .
Kinomic Screening: FLT3-ITD mutations induce constitutive Thr48 phosphorylation during interphase, reversible by FLT3 inhibitors (midostaurin, quizartinib) .
MEK/ERK Dependence: MEK inhibition (UO126) reduces Thr48 phosphorylation, linking it to ERK signaling .
Functional Impact: Overexpression of CDC25C in FLT3-ITD cells alters cell cycle progression but does not mitigate apoptosis under stress .
Distinct Phospho-Isoforms: Antibodies against Thr48, Thr67, and Thr130 reveal non-overlapping phosphorylation patterns, indicating site-specific regulation during mitosis .
Validation: siRNA knockdown confirms antibody specificity for CDC25C, with Thr48 antibodies detecting multiple isoforms (50–85 kDa) .
Specificity: Antibodies show no cross-reactivity with non-phosphorylated peptides or alanine mutants (e.g., T48A) .
Functional Assays: Immunoprecipitation studies demonstrate exclusive recognition of single phospho-TP motifs (Thr48, Thr67, Thr130) .