NUP120 Antibody

NUP120 Antibody: Definition and Applications

NUP120 antibodies are immunoreagents designed to detect and characterize the NUP120 protein in experimental settings. These antibodies enable:

• Localization studies (e.g., immunofluorescence, GFP tagging) to map NUP120 within the NPC .

• Co-immunoprecipitation (Co-IP) to identify interaction partners like NUP133 and NUP107 .

• Functional assays to study NPC assembly, mRNA transport, and mitotic stability .

Development of NUP120-Specific Nanobodies

Recent advances include camelid-derived nanobodies (single-domain antibodies) engineered for high specificity and affinity. Key developments:

• Phage Display Libraries: Immunization of alpacas with recombinant Y-complex proteins (including NUP120) yielded nanobodies like VHH-SAN10, which colocalizes with NUP120-GFP in S. cerevisiae .

• Binding Kinetics: Bio-layer interferometry revealed dissociation constants (K_D) ranging from 14 pM (VHH-SAN3) to 230 nM (VHH-SAN4), highlighting diverse affinities .

Table 1: Selected NUP120 Nanobody Characteristics

Functional Roles Revealed by Antibody-Based Studies

• NPC Assembly: NUP120 depletion disrupts NPC distribution, causing clustering at the nuclear envelope .

• mRNA Transport: Deletion of NUP120 leads to poly(A)+ mRNA accumulation in the nucleus .

• Genome Stability: nup120Δ mutants exhibit mitotic spindle defects and chromosome missegregation, linking NUP120 to Ran GTPase pathway regulation .

Case Study: Antibodies in Chromatin Interaction Analysis

NUP120 antibodies were pivotal in identifying its role in chromatin organization:

• Mig1 Repressor Binding: In nup120Δ yeast, Mig1 fails to bind promoters like SUC2 and HXK1, implicating NUP120 in nucleosome positioning .