LIN-36 Protein in C. elegans: A Cell-Cycle Regulator
LIN-36 is a C. elegans THAP domain protein critical for cell-cycle regulation and germline development. It functions as part of the DREAM (DP, E2F, and MuvB) complex, which represses cell-cycle genes and maintains quiescence. Key findings include:
Mechanistic Roles
Function
Details
Source
Cell-cycle repression
LIN-36 promotes DREAM binding to classical cell-cycle targets (e.g., cdc-14, cki-1) and enriches H2A.Z histone variants in gene bodies.
Germline-specific repression
LIN-15B (a paralog of LIN-36) represses germline-specific genes in the soma via H3K9me2 promoter marking.
Genetic interactions
Loss of LIN-36 enhances intestinal hyperproliferation phenotypes in lin-35 (Rb homolog) or cdc-14 (Cdc14 phosphatase) mutants.
LIN-36 and LIN-15B exhibit distinct genomic binding patterns:
LIN-36: Overlaps with LIN-35 at 95% of peaks, enriched in cell-cycle genes.
LIN-15B: Overlaps with LIN-35 at 72% of peaks, enriched in germline-specific genes.
L-35/L-36 Antigens in Human T Cells
In human immunology, monoclonal antibodies L-35 and L-36 define novel T cell activation antigens expressed on both CD4⁺ and CD8⁺ subsets. These markers are absent on resting T cells but appear after mitogen stimulation.
Antibodies Targeting IL-36 or Connexin 36
While no direct references to "LIN-36 antibodies" exist, antibodies against IL-36 family members or Connexin 36 are well-characterized:
IL-36 α/β/γ Antibodies
Target
Antibody
Key Findings
Source
IL-36α (IL-1F6)
MAB10781 (Rabbit)
Neutralizes IL-36α-induced CXCL8/IL-8 secretion in A431 cells (ND₅₀: 0.2–1.2 µg/mL). Detects a 15 kDa band in Western blots.
This antibody targets LIN-36, a protein essential for negatively regulating vulval development in nematodes. LIN-36 functions by antagonizing Ras-mediated vulval induction, acting autonomously within individual cells.
Expressed in vulval precursor P(3-8).p cells and their descendants, neurons of the head, tail and ventral cord, hypodermal and intestinal cells and germline cells.
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