All Topics  
CD33

 

   Email Print
   Bookmark   Link






 

CD33



 
 
CD33 is a transmembrane receptor
Transmembrane receptor

Transmembrane receptors are integral membrane proteins, which reside and operate typically within a cell's plasma membrane, but also in the biological membrane of some subcellular compartments and organelles....
 expressed on cells of myeloid
Myeloid

The term myeloid suggests an origin in the bone marrow or spinal cord, or a resemblance to the marrow or spinal cord.In hematopoiesis, the term "myeloid cell" is used to describe any leukocyte that is not a lymphocyte....
 lineage. It is usually considered myeloid-specific, but it can also be found on some lymphoid cells.

It binds sialic acids, therefore is a member of the SIGLEC
SIGLEC

SIGLECs, short for sialic acid binding Ig-like lectins are cell surface receptors and members of the immunoglobulin superfamily that recognize sugars....
 family of lectin
Lectin

Lectins are sugar-binding proteins which are highly specific for their sugar moieties. They typically play a role in biological recognition phenomena involving cells and proteins....
s.








Discussion
Ask a question about 'CD33'
Start a new discussion about 'CD33'
Answer questions from other users
Full Discussion Forum



Encyclopedia


CD33 is a transmembrane receptor
Transmembrane receptor

Transmembrane receptors are integral membrane proteins, which reside and operate typically within a cell's plasma membrane, but also in the biological membrane of some subcellular compartments and organelles....
 expressed on cells of myeloid
Myeloid

The term myeloid suggests an origin in the bone marrow or spinal cord, or a resemblance to the marrow or spinal cord.In hematopoiesis, the term "myeloid cell" is used to describe any leukocyte that is not a lymphocyte....
 lineage. It is usually considered myeloid-specific, but it can also be found on some lymphoid cells.

It binds sialic acids, therefore is a member of the SIGLEC
SIGLEC

SIGLECs, short for sialic acid binding Ig-like lectins are cell surface receptors and members of the immunoglobulin superfamily that recognize sugars....
 family of lectin
Lectin

Lectins are sugar-binding proteins which are highly specific for their sugar moieties. They typically play a role in biological recognition phenomena involving cells and proteins....
s.

Structure

The extracellular portion of this receptor contains two immunoglobulin domains
Immunoglobulin fold

An immunoglobulin fold is a common all-? protein fold that consists of a 2-layer sandwich of ~7 antiparallel beta sheet arranged in two beta sheet....
 (one IgV and one IgC2 domain), placing CD33 within the immunoglobulin superfamily
Immunoglobulin superfamily

The immunoglobulin superfamily is a large group of cell surface and soluble proteins that are involved in the recognition, binding, or cell adhesion processes of Cell ....
. The intracellular portion of CD33 contains immunoreceptor tyrosine-based inhibitory motif
Immunoreceptor tyrosine-based inhibitory motif

An immunoreceptor tyrosine-based inhibition motif , is a conserved sequence of amino acids that is found in the cytoplasmic tails of many inhibitory immune receptor of the immune system....
s (ITIMs) that are implicated in inhibition of cellular activity.

Clinical significance

CD33 is the target of gemtuzumab ozogamicin
Gemtuzumab ozogamicin

Gemtuzumab ozogamicin is a monoclonal antibody used to treat acute myelogenous leukemia.It is a monoclonal antibody to CD33 linked to a cytotoxic agent, calicheamicin....
, a monoclonal antibody-based treated for acute myeloid leukemia
Acute myeloid leukemia

Acute myeloid leukemia , also known as acute myelogenous leukemia, is a cancer of the myeloid line of white blood cells, characterized by the rapid proliferation of abnormal cells which accumulate in the bone marrow and interfere with haematopoiesis....
.