The protein encoded by this gene is a cell-surface glycoprotein involved in cell-cell interactions, cell adhesion and migration. It is a receptor for hyaluronic acid (HA) and can also interact with other ligands, such as osteopontin, collagens, and matrix metalloproteinases (MMPs). This protein participates in a wide variety of cellular functions including lymphocyte activation, recirculation and homing, hematopoiesis, and tumor metastasis. Transcripts for this gene undergo complex alternative splicing that results in many functionally distinct isoforms, however, the full length nature of some of these variants has not been determined. Alternative splicing is the basis for the structural and functional diversity of this protein, and may be related to tumor metastasis. [provided by RefSeq, Jul 2008].
Function:
Receptor for hyaluronic acid (HA). Mediates cell-cell and cell-matrix interactions through its affinity for HA, and possibly also through its affinity for other ligands such as osteopontin, collagens, and matrix metalloproteinases (MMPs). Adhesion with HA plays an important role in cell migration, tumor growth and progression. Also involved in lymphocyte activation, recirculation and homing, and in hematopoiesis. Altered expression or dysfunction causes numerous pathogenic phenotypes. Great protein heterogeneity due to numerous alternative splicing and post-translational modification events.
Subunit:
Interacts with PKN2. Interacts with HA, as well as other glycosaminoglycans, collagen, laminin, and fibronectin via its N-terminal segment. Interacts with ANK, the ERM proteins (VIL2, RDX and MSN), and NF2 via its SLCterminal segment.
Subcellular Location:
Membrane; Single-pass type I membrane protein. Note=Colocalizes with actin in membrane protrusions at wounding edges.
Tissue Specificity:
Isoform 10 (epithelial isoform) is expressed by cells of epithelium and highly expressed by carcinomas. Expression is repressed in neuroblastoma cells.
Post-translational modifications:
Proteolytically cleaved in the extracellular matrix by specific proteinases (possibly MMPs) in several cell lines and tumors.
N- and O-glycosylated. O-glycosylation contains more-or-less-sulfated chondroitin sulfate glycans, whose number may affect the accessibility of specific proteinases to their cleavage site(s). It is uncertain if O-glycosylation occurs on Thr-637 or Thr-638.
Phosphorylated; activation of PKC results in the dephosphorylation of Ser-706 (constitutive phosphorylation site), and the phosphorylation of Ser-672.
Similarity:
Contains 1 Link domain.
SWISS:
P15379
Gene ID:
12505
Database links:
Entrez Gene: 281057 Cow
Entrez Gene: 960 Human
Entrez Gene: 12505 Mouse
Entrez Gene: 100301546 Rabbit
Entrez Gene: 25406 Rat
Omim: 107269 Human
SwissProt: Q29423 Cow
SwissProt: P16070 Human
SwissProt: P15379 Mouse
SwissProt: P26051 Rat
Unigene: 502328 Human
Unigene: 423621 Mouse
Unigene: 1120 Rat
| Picture |
Blank control(blue):A549 (fixed with 2% paraformaldehyde for 10 min at 37℃).
Primary Antibody:Rabbit Anti-CD44 antibody (SL4916R,Green); Dilution: 1μg in 100 μL 1X PBS containing 0.5% BSA;
Isotype Control Antibody: Rabbit IgG(orange) ,used under the same conditions;
Secondary Antibody: Goat anti-rabbit IgG-FITC(white blue), Dilution: 1:200 in 1 X PBS containing 0.5% BSA.
Blank control(blue):Mouse spleen (fixed with 2% paraformaldehyde for 10 min at 37℃).
Primary Antibody:Rabbit Anti-CD44 antibody (SL4916R,Green); Dilution: 1μg in 100 μL 1X PBS containing 0.5% BSA;
Isotype Control Antibody: Rabbit IgG(orange) ,used under the same conditions;
Secondary Antibody: Goat anti-rabbit IgG-FITC(white blue), Dilution: 1:200 in 1 X PBS containing 0.5% BSA.
Blank control (blue line): U251 (fixed with 70% ethanol overnight at 4℃ and then permeabilized with 0.1% PBS-Tween for 20 min at room temperature).
Primary Antibody (green line): Rabbit Anti-CD44 antibody (SL4916R),Dilution: 1μg /10^6 cells;
Isotype Control Antibody (orange line): Rabbit IgG .
Secondary Antibody (white blue line): Goat anti-rabbit IgG-PE, Dilution: 1μg /test.
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