Cell Signaling Technology

Product Pathways - Neuroscience

SAP102 (A7R8L) Rabbit mAb #47421

No. Size Price
47421S 100 µl ( 10 western blots ) ¥3,100.00 现货查询 购买询价
47421 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human,Mouse,Rat, Endogenous 102 Rabbit
IP 1:50

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting, IP=Immunoprecipitation,

Specificity / Sensitivity

SAP102 (A7R8L) Rabbit mAb recognizes endogenous levels of total SAP102 protein.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human SAP102 protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from mouse brain, C2C12 cells, rat brain, and KNRK cells using SAP102 (A7R8L) Rabbit mAb (upper) or α-Actinin (D6F6) XP® Rabbit mAb #6487 (lower).


Synapse-associated protein 102 (SAP102, DLG3) belongs to the membrane-associated guanylate kinase (MAGUK) protein family and is a homolog of the Drosophila disc large (dlg) tumor suppressor protein. SAP102 consists of three PDZ domains, a Src homology 3 (SH3) domain, and a guanylate kinase (GK) domain (1). The SAP102 protein is more highly expressed in nonproliferating cells than in proliferating cells, indicating a role in the negative regulation of cell growth. SAP102 interacts with the carboxy terminus of the adenomatous polyposis coli (APC) tumor suppressor protein. Furthermore, SAP102 associates with PSD95 in the presence of calcium while the SH3 domain of SAP102 binds calmodulin (2,3). All three PDZ domains of SAP102 participate in binding to the NMDA receptor, interacting specifically with the carboxy-terminal domain of the N-methyl-D-aspartate receptor 2B (NR2B). This SAP102-NR2B interaction may facilitate AMPA receptor withdrawal from the postsynaptic membrane by inhibiting the Erk/MAPK pathway (1,4). Neuronal SAP102 is concentrated at dendritic shafts and spines, axons, and synaptic junctions. At excitatory synapses, SAP102 is involved in NMDA receptor clustering and immobilization and links NMDA receptors to the submembraneous cytomatrix (4). SAP102 and the NMDA receptor function together to mediate plasticity, behavior, and signal transduction (1). A nonsyndromic form of X-linked mental retardation is caused by loss-of-function mutations to the SAP102 gene. The SAP102 protein may be involved in autism since MAGUK proteins in the NMDA receptor complex bind directly to the autism susceptibility gene, neuroligin (1,5).

  1. Cuthbert, P.C. et al. (2007) J Neurosci 27, 2673-82.
  2. Makino, K. et al. (1997) Oncogene 14, 2425-33.
  3. Masuko, N. et al. (1999) J Biol Chem 274, 5782-90.
  4. Lau, L.F. et al. (1996) J Biol Chem 271, 21622-8.
  5. Yan, J. et al. (2005) Mol Psychiatry 10, 329-32.

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