Semaphorin-4D (SEMA4D) also known as Cluster of Differentiation 100 (CD100), is a protein of the semaphorin family that in humans is encoded by the SEMA4D gene. [5]
Semaphorin 4D (Sema 4D) is an axon guidance molecule which is secreted by oligodendrocytes and induces growth cone collapse in the central nervous system. By binding plexin B1 receptor it functions as an R-Ras GTPase-activating protein (GAP) and repels axon growth cones in both the mature central nervous system. [6]
In the immune system, CD100 binds CD72 to activate B cells and dendritic cells, though much about this interaction is still under investigation. [7] [8]
During skin damage repairs, SEMA4D interacts with Plexin B2 on Gamma delta T cells to play a role in the healing process. [9]
Complement receptor type 2 (CR2), also known as complement C3d receptor, Epstein-Barr virus receptor, and CD21, is a protein that in humans is encoded by the CR2 gene.
Chemokine ligand 19 (CCL19) is a protein that in humans is encoded by the CCL19 gene.
CD5 is a cluster of differentiation expressed on the surface of T cells and in a subset of murine B cells known as B-1a. The expression of this receptor in human B cells has been a controversial topic and to date there is no consensus regarding the role of this receptor as a marker of human B cells. B-1 cells have limited diversity of their B-cell receptor due to their lack of the enzyme terminal deoxynucleotidyl transferase (TdT) and are potentially self-reactive. CD5 serves to mitigate activating signals from the BCR so that the B-1 cells can only be activated by very strong stimuli and not by normal tissue proteins. CD5 was used as a T-cell marker until monoclonal antibodies against CD3 were developed.
Death receptor 4 (DR4), also known as TRAIL receptor 1 (TRAILR1) and tumor necrosis factor receptor superfamily member 10A (TNFRSF10A), is a cell surface receptor of the TNF-receptor superfamily that binds TRAIL and mediates apoptosis.
T-cell surface glycoprotein CD3 gamma chain is a protein that in humans is encoded by the CD3G gene.
C-C chemokine receptor type 11 is a protein that in humans is encoded by the CCRL1 gene.
Signal regulatory protein α (SIRPα) is a regulatory membrane glycoprotein from SIRP family expressed mainly by myeloid cells and also by stem cells or neurons.
CD48 antigen also known as B-lymphocyte activation marker (BLAST-1) or signaling lymphocytic activation molecule 2 (SLAMF2) is a protein that in humans is encoded by the CD48 gene.
Plexin B1 is a protein of the plexin family that in humans is encoded by the PLXNB1 gene.
Killer cell immunoglobulin-like receptor 3DL2 is a protein that in humans is encoded by the KIR3DL2 gene. The protein IGSF8 has been identified as a binding partner of the KIR3DL2 receptor. Binding of IGSF8 to KIR3DL2 expressed on the surface of natural killer (NK) cells acts as an immune checkpoint that inhibits cytotoxic activity and cell killing by NK cells. KIR3DL2 is highly expressed on both NK cells and γδ T cells.
SLAM family member 6 is a protein that in humans is encoded by the SLAMF6 gene.
Rnd1 is a small signaling G protein, and is a member of the Rnd subgroup of the Rho family of GTPases. It is encoded by the gene RND1.
Transcription factor 7 is the gene that in humans encodes for the TCF1 protein.
Interleukin 21 receptor is a type I cytokine receptor. IL21R is its human gene.
Hematopoietic cell signal transducer is a protein that in humans is encoded by the HCST gene.
Leukocyte immunoglobulin-like receptor subfamily B member 3 is a protein that in humans is encoded by the LILRB3 gene.
RAS guanyl-releasing protein 1 is a protein that in humans is encoded by the RASGRP1 gene.
Semaphorin-4A is a protein that in humans is encoded by the SEMA4A gene.
Leukocyte immunoglobulin-like receptor subfamily A member 2 is a protein that in humans is encoded by the LILRA2 gene.
T-cell surface glycoprotein CD8 alpha chain, is a protein encoded by CD8A gene.