CD44 Products

Description

CD44 is a ubiquitously expressed protein that is the major receptor for hyaluronan and exerts control over cell growth and migration (1‑3). Human CD44 has a 20 amino acid (aa) signal sequence, an extracellular domain (ECD) with a 100 aa hyaluronan‑binding disulfide‑stabilized link region and a 325‑530 aa stem region, a 21 aa transmembrane domain, and a 72 aa cytoplasmic domain. CD44 transcripts undergo complex alternative splicing, and, within the stem, ten variably spliced exons (v1‑10 corresponding to exons 6‑15; although human CD44 lacks v1/exon 6) produce multiple protein isoforms (1‑4). The standard or hematopoietic form, CD44H, does not include the variable segments (1‑4). Cancer aggressiveness and T cell activation have been correlated with expression of specific isoforms (1, 4, 5). Human CD44v5 contains exon 10 and is associated with tumor progression and metastasis in many types of cancer including breast, colon, lung, renal, skin, and ovarian tumors (6, 12). With variable N‑ and O‑glycosylation and splicing within the stalk, CD44 can range from 80 to 200 kDa (1). Within the N‑terminal invariant portion of the ECD (aa 21‑222), human CD44 shares 76%, 76%, 86%, 83% and 79% identity with corresponding mouse, rat, equine, canine and bovine CD44, respectively. The many reported functions of CD44 fall within three categories (1). First, CD44 binds hyaluronan and other ligands within the extracellular matrix and can function as a "platform" for growth factors and metalloproteinases. Second, CD44 can function as a co‑receptor that modifies activity of receptors including MET and the ERBB family of tyrosine kinases. Third, the CD44 intracellular domain links the plasma membrane to the actin cytoskeleton via the ERM proteins, ezrin, radixin and moesin. CD44 can be synthesized in a soluble form (6) or may be cleaved at multiple sites by either membrane‑type matrix metalloproteinases, or ADAM proteases to produce soluble ectodomains (8, 9). The cellular portion may then undergo gamma secretase‑dependent intramembrane cleavage to form an A beta‑like transmembrane portion and a cytoplasmic signaling portion that affects gene expression (10, 11). These cleavage events are thought to promote metastasis by enhancing tumor cell motility and growth (1, 8). CD44v5 plays important role in cancer progression involving in cell migration and invasion and is considered a functional cancer biomarker (6, 12).

Bioinformatics

Uniprot	NP_001001391.1
Product By Gene ID	960
Alternate Names	CD44 antigen CD44 molecule (Indian blood group) CD44 CD44R CDw44 cell surface glycoprotein CD44 chondroitin sulfate proteoglycan 8 CSPG8 ECMR-III epican Extracellular matrix receptor III GP90 lymphocyte homing/adhesion receptor HCAM HCELL hematopoietic cell E- and L-selectin ligand Heparan sulfate proteoglycan Hermes antigen homing function and Indian blood group system HUTCH-I Hyaluronate receptor IN LHR MC56 MDU2 MDU2CD44 antigen (homing function and Indian blood group system) MDU3 MDU3CDW44 MIC4 MIC4MGC10468 MUTCH-I Pgp1 PGP-1 PGP-I Phagocytic glycoprotein 1 Phagocytic glycoprotein I

Related CD44 Blog Posts

Check out the latest blog posts on CD44.

Taking Biomarker Discovery From 2D to 3D: Increased Biological Activity of EVs Isolated From 3D Prostate Cancer Cultures Jamshed Arslan, Pharm D, PhD Tissues within the human body are made of a three-dimensional (3D) arrangement of cells working together to perform vital functions. The commonly used 2D monolayer cultures have limited ...    Read more.

Stemness is responsible for onset and metastasis of colorectal cancer By Jamshed Arslan, Pharm. D., PhD. Colorectal cancer stem cells are a rare subpopulation of colorectal cancer cells that can self-renew and initiate and sustain tumor growth when transplanted into an animal host.1,2 C...    Read more.

The Osteopontin Antibody and Hepatic Research Antibody suppliers, such as us at Novus Biologicals, supply a wide range of cell marker products, among them the Osteopontin antibody. Recently, the osteopontin antibody has proven useful in hepatic cancer research.Osteopontin (OPN) is mainly expres...    Read more.

CD Antibodies Uncover Markers for Rare Breast Cancer We at Novus Biologicals have added several new products to our CD antibody database. The CD, or Cluster of Differential proteins are a family of type I transmembrane glycoproteins widely expressed in immune cell populations. These include B cells, thy...    Read more.

Read more CD44 related blogs.