CAMP
Cathelicidin antimicrobial peptide
Also known as: CAMP_HUMAN, CAP18, FALL-39, FALL39, LL37
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P49913
- Gene
- CAMP
- Ensembl
- ENSG00000164047
- Chromosome
- 3
- Canonical length
- 170 aa
- Protein class
- Plasma proteins, Predicted secreted proteins, Transporters
- Secretome location
- Secreted to blood
- Quaternary structure
- Homotrimer
OverviewNCBI Gene
This gene encodes a member of an antimicrobial peptide family, characterized by a highly conserved N-terminal signal peptide containing a cathelin domain and a structurally variable cationic antimicrobial peptide, which is produced by extracellular proteolysis from the C-terminus. The protein plays an important role in innate immunity defense against viruses. In addition to its antibacterial, antifungal, and antiviral activities, the encoded protein functions in cell chemotaxis, immune mediator induction, and inflammatory response regulation. [provided by RefSeq, Sep 2021]
Canonical amino-acid sequenceUniProt
170 residues, UniProt reviewed canonical sequence.
>P49913|CAMP
1 MKTQRDGHSL GRWSLVLLLL GLVMPLAIIA QVLSYKEAVL RAIDGINQRS SDANLYRLLD
61 LDPRPTMDGD PDTPKPVSFT VKETVCPRTT QQSPEDCDFK KDGLVKRCMG TVTLNQARGS
121 FDISCDKDNK RFALLGDFFR KSKEKIGKEF KRIVQRIKDF LRNLVPRTESLocalizationUniProt · AlphaFold · HPA
Whether an antibody against CAMP 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
- Secreted
- Secreted
- Yes
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.43
- Highest tissue expression
- 2,752 nTPM
Expression across tissuesHPA
Tissue
- bone marrow: 2,752 nTPM
- epididymis: 321 nTPM
- spleen: 28 nTPM
- salivary gland: 14 nTPM
- thymus: 9.9 nTPM
- lung: 9.6 nTPM
Single-cell type
- epididymal principal cells: 2,707 nCPM
- neutrophil progenitors: 1,430 nCPM
- neutrophils: 240 nCPM
- salivary acinar cells: 137 nCPM
- salivary myoepithelial cells: 84 nCPM
- tuft cells: 81 nCPM
Immune cell
- neutrophil: 338 nTPM
- total PBMC: 87 nTPM
- eosinophil: 85 nTPM
- basophil: 38 nTPM
- non-classical monocyte: 28 nTPM
- intermediate monocyte: 9.8 nTPM
Brain region
- cerebral cortex: 0.4 nTPM
- medulla oblongata: 0.4 nTPM
- pons: 0.2 nTPM
- basal ganglia: 0.1 nTPM
- hippocampal formation: 0.1 nTPM
- midbrain: 0.1 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about CAMP.
Disease | ImmuneIEDB
Conditions an epitope on CAMP was assayed in.
- psoriasis T cell
- autoimmune atherosclerosis T cell
- coronary artery disease T cell
- systemic scleroderma T cell
- atopic dermatitis T cell
Disease | AutoantibodyPubMed
Conditions in which antibodies against CAMP are reported. Each links to that disease's full target list.
ReferencesPubMed · IEDB
Publications for CAMP from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.
Reference: AutoantibodyPubMed
11 publications
- Netting Neutrophils Activate Autoreactive B Cells in Lupus.
2018 · J Immunol · RCR 5.4 · 142 citations - Anti-LL37 Antibodies Are Present in Psoriatic Arthritis (PsA) Patients: New Biomarkers in PsA.
2018 · Front Immunol · RCR 3.7 · 84 citations - Current knowledge on autoantigens and autoantibodies in psoriasis.
2020 · Scand J Immunol · RCR 3.4 · 57 citations - Identification of Novel Autoantibodies Associated With Psoriatic Arthritis.
2019 · Arthritis Rheumatol · RCR 3.1 · 62 citations - Ligation of signal inhibitory receptor on leukocytes-1 suppresses the release of neutrophil extracellular traps in systemic lupus erythematosus.
2013 · PLoS One · RCR 1.9 · 64 citations
Show 6 more
- The nature of the post-translational modifications of the autoantigen LL37 influences the autoreactive T-helper cell phenotype in psoriasis.
2025 · Front Immunol · RCR 1.7 · 5 citations - Native/citrullinated LL37-specific T-cells help autoantibody production in Systemic Lupus Erythematosus.
2020 · Sci Rep · RCR 1.4 · 30 citations - Characterization of circulating extracellular traps and immune responses to citrullinated LL37 in psoriasis.
2023 · Front Immunol · RCR 1.2 · 9 citations - A Novel Pathway of Platelet Activation in ACS Mediated by LL-37 Immunoglobulin G Autoantibody Immune Complexes.
2024 · JACC Basic Transl Sci · RCR 0.7 · 4 citations - LL-37 IgG levels are associated with clinical characteristics and T follicular cell response in acute coronary syndrome in adults.
2026 · Physiol Rep - Adaptive immune response to the autoantigen LL-37 differentiates atherosclerotic cardiovascular disease phenotypes.
2026 · Clin Transl Immunology
Reference: T cellIEDB
2 publications
- The antimicrobial peptide LL37 is a T-cell autoantigen in psoriasis.
2014 · Nat Commun · RCR 13.8 · 424 citations - The Role of T Cells Reactive to the Cathelicidin Antimicrobial Peptide LL-37 in Acute Coronary Syndrome and Plaque Calcification.
2020 · Front Immunol · RCR 0.6 · 12 citations
Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. IEDB — curated epitope assays from the Immune Epitope Database (Vita et al., Nucleic Acids Research 2019). Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.
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)
- 1.55
- gnomAD pLI
- 0
- gnomAD missense Z
- 0.16
- DepMap mean gene effect
- -0.01
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 2% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- amyloid fibril formation
- antibacterial humoral response
- antimicrobial humoral immune response mediated by antimicrobial peptide
- cellular response to butyrate
- cellular response to exogenous dsRNA
- cellular response to interleukin-1
- cellular response to interleukin-6
- cellular response to lipopolysaccharide
- cellular response to peptidoglycan
- cellular response to tumor necrosis factor
- cytolysis
- defense response to bacterium
- defense response to Gram-negative bacterium
- defense response to Gram-positive bacterium
- dentinogenesis
- innate immune response
- innate immune response in mucosa
- killing by host of symbiont cells
- leukotriene biosynthetic process
- negative regulation of apoptotic process
- neutrophil activation
- positive regulation of angiogenesis
- positive regulation of antimicrobial humoral response
- positive regulation of cell population proliferation
- positive regulation of granulocyte macrophage colony-stimulating factor production
- positive regulation of insulin secretion involved in cellular response to glucose stimulus
- positive regulation of interleukin-1 beta production
- positive regulation of macrophage inflammatory protein 1 alpha production
- positive regulation of monocyte chemotactic protein-1 production
- positive regulation of tumor necrosis factor production
- response to glucose
- prostaglandin production involved in inflammatory response
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Cystatin superfamily
- Cathelicidin
- Cathelicidin-like
- Cathelicidin, conserved site
- Cathelicidin, antimicrobial peptide, C-terminal
- LPS binding domain of CAP18 (C terminal)
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads CAMP as an antibody target. Whether an autoantibody or antibody against CAMP could matter depends on whether native CAMP is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
CAMP is annotated as secreted, so native CAMP circulates and is directly accessible to antibodies. Secreted and cell-surface proteins are the autoantibody targets most likely to act like drugs, blocking or depleting the native protein.
Annotation status
The present source text does not explicitly label CAMP as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
Loading the interactive Seroatlas protein explorer...