ICAM2
Intercellular adhesion molecule 2
Also known as: CD102, ICAM2_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P13598
- Gene
- ICAM2
- Ensembl
- ENSG00000108622
- Chromosome
- 17
- Canonical length
- 275 aa
- Protein class
- CD markers, Plasma proteins, Predicted intracellular proteins, Predicted membrane proteins
- Subcellular location
- Plasma membrane,Cytosol
OverviewNCBI Gene
The protein encoded by this gene is a member of the intercellular adhesion molecule (ICAM) family. All ICAM proteins are type I transmembrane glycoproteins, contain 2-9 immunoglobulin-like C2-type domains, and bind to the leukocyte adhesion LFA-1 protein. This protein may play a role in lymphocyte recirculation by blocking LFA-1-dependent cell adhesion. It mediates adhesive interactions important for antigen-specific immune response, NK-cell mediated clearance, lymphocyte recirculation, and other cellular interactions important for immune response and surveillance. Several transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]
Canonical amino-acid sequenceUniProt
275 residues, UniProt reviewed canonical sequence.
>P13598|ICAM2
1 MSSFGYRTLT VALFTLICCP GSDEKVFEVH VRPKKLAVEP KGSLEVNCST TCNQPEVGGL
61 ETSLDKILLD EQAQWKHYLV SNISHDTVLQ CHFTCSGKQE SMNSNVSVYQ PPRQVILTLQ
121 PTLVAVGKSF TIECRVPTVE PLDSLTLFLF RGNETLHYET FGKAAPAPQE ATATFNSTAD
181 REDGHRNFSC LAVLDLMSRG GNIFHKHSAP KMLEIYEPVS DSQMVIIVTV VSVLLSLFVT
241 SVLLCFIFGQ HLRQQRMGTY GVRAAWRRLP QAFRPLocalizationUniProt · AlphaFold · HPA
Whether an antibody against ICAM2 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Cell surface
- Secreted
- No
- Transmembrane segments
- 1
- Mean surface accessibility (rSASA)
- 0.38
- Highest tissue expression
- 157 nTPM
Expression across tissuesHPA
Tissue
- spleen: 157 nTPM
- heart muscle: 97 nTPM
- adipose tissue: 91 nTPM
- lung: 79 nTPM
- breast: 76 nTPM
- placenta: 75 nTPM
Single-cell type
- platelets: 608 nCPM
- vascular endothelial cells: 199 nCPM
- plasma cells: 136 nCPM
- megakaryocytes: 111 nCPM
- lymphatic endothelial cells: 102 nCPM
- nk-cells: 84 nCPM
Immune cell
- non-classical monocyte: 528 nTPM
- total PBMC: 502 nTPM
- intermediate monocyte: 465 nTPM
- T-reg: 452 nTPM
- basophil: 447 nTPM
- naive CD4 T-cell: 402 nTPM
Brain region
- thalamus: 24 nTPM
- pons: 21 nTPM
- medulla oblongata: 19 nTPM
- spinal cord: 17 nTPM
- midbrain: 16 nTPM
- hypothalamus: 16 nTPM
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 1.25
- gnomAD pLI
- 0
- gnomAD missense Z
- 0.41
- DepMap mean gene effect
- 0.15
- DepMap dependency class
- none
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Intercellular adhesion molecule/vascular cell adhesion molecule, N-terminal
- Intercellular adhesion molecule
- Intercellular adhesion molecule, N-terminal
- Immunoglobulin-like fold
- Immunoglobulin-like domain superfamily
- Intercellular adhesion molecule/vascular cell adhesion molecule
- Intercellular adhesion molecule (ICAM), N-terminal domain
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of ICAM2 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads ICAM2 as an antibody target. Whether an autoantibody or antibody against ICAM2 could matter depends on whether native ICAM2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
ICAM2 is annotated at the cell surface, where native ICAM2 is exposed to circulating antibodies and is a prime autoantibody target that could block, deplete, or overstimulate it.
Annotation status
The present source text does not explicitly label ICAM2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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