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The 11 function of SRCR of the protein

S.NOUniprot IDProtein Name Sequence LengthSRCR Repeated RegionFunction
1 Q9UGM3 Deleted in malignant brain tumors 1 protein 2413"May be considered as a candidate tumor suppressor gene for brain, lung, esophageal, gastric, and colorectal cancers.
May play roles in mucosal defense system, cellular immune defense and epithelial differentiation.
May play a role as an opsonin receptor for SFTPD and SPAR in macrophage tissues throughout the body, including epithelial cells lining the gastrointestinal tract.
May play a role in liver regeneration.
May be an important factor in fate decision and differentiation of transit-amplifying ductular (oval) cells within the hepatic lineage.
Required for terminal differentiation of columnar epithelial cells during early embryogenesis.
May function as a binding protein in saliva for the regulation of taste sensation.
Binds to HIV-1 envelope protein and has been shown to both inhibit and facilitate viral transmission.
Displays a broad calcium-dependent binding spectrum against both Gram-positive and Gram-negative bacteria, suggesting a role in defense against bacterial pathogens.
Binds to a range of poly-sulfated and poly-phosphorylated ligands which may explain its broad bacterial-binding specificity.
Inhibits cytoinvasion of S.
enterica.
Associates with the actin cytoskeleton and is involved in its remodeling during regulated exocytosis.
Interacts with pancreatic zymogens in a pH-dependent manner and may act as a Golgi cargo receptor in the regulated secretory pathway of the pancreatic acinar cell".
2 A1L4H1 Soluble scavenger receptor cysteine-rich domain-containing protein SSC5D 1573"Binds to extracellular matrix proteins.
Binds to pathogen-associated molecular patterns (PAMPs) present on the cell walls of Gram-positive and Gram-negative bacteria and fungi, behaving as a pattern recognition receptor (PRR).
Induces bacterial and fungal aggregation and subsequent inhibition of PAMP-induced cytokine release.
Does not possess intrinsic bactericidal activity.
May play a role in the innate defense and homeostasis of certain epithelial surfaces (By similarity)".
3 O43866 CD5 antigen-like 347"Secreted protein that acts as a key regulator of lipid synthesis: mainly expressed by macrophages in lymphoid and inflammed tissues and regulates mechanisms in inflammatory responses, such as infection or atherosclerosis.
Able to inhibit lipid droplet size in adipocytes.
Following incorporation into mature adipocytes via CD36-mediated endocytosis, associates with cytosolic FASN, inhibiting fatty acid synthase activity and leading to lipolysis, the degradation of triacylglycerols into glycerol and free fatty acids (FFA).
CD5L-induced lipolysis occurs with progression of obesity: participates in obesity-associated inflammation following recruitment of inflammatory macrophages into adipose tissues, a cause of insulin resistance and obesity-related metabolic disease.
Regulation of intracellular lipids mediated by CD5L has a direct effect on transcription regulation mediated by nuclear receptors ROR-gamma (RORC).
Acts as a key regulator of metabolic switch in T-helper Th17 cells.
Regulates the expression of pro-inflammatory genes in Th17 cells by altering the lipid content and limiting synthesis of cholesterol ligand of RORC, the master transcription factor of Th17-cell differentiation.
CD5L is mainly present in non-pathogenic Th17 cells, where it decreases the content of polyunsaturated fatty acyls (PUFA), affecting two metabolic proteins MSMO1 and CYP51A1, which synthesize ligands of RORC, limiting RORC activity and expression of pro-inflammatory genes.
Participates in obesity-associated autoimmunity via its association with IgM, interfering with the binding of IgM to Fcalpha/mu receptor and enhancing the development of long-lived plasma cells that produce high-affinity IgG autoantibodies (By similarity).
Also acts as an inhibitor of apoptosis in macrophages: promotes macrophage survival from the apoptotic effects of oxidized lipids in case of atherosclerosis (PubMed:24295828).
Involved in early response to microbial infection against various pathogens by acting as a pattern recognition receptor and by promoting autophagy (PubMed:16030018, PubMed:24223991, PubMed:24583716, PubMed:25713983)".
4 Q4G0T1 Scavenger receptor cysteine-rich domain-containing protein SCART11027"May play a role in the immune system, perhaps as a co-receptor on alphabeta and gammadelta T-cells".
5 Q96JB6 Lysyl oxidase homolog 4 756May modulate the formation of a collagenous extracellular matrix.
6 P06127 T-cell surface glycoprotein CD5 495May act as a receptor in regulating T-cell proliferation.
7 P58215 Lysyl oxidase homolog 3 753"Protein-lysine 6-oxidase that mediates the oxidation of peptidyl lysine residues to allysine in target proteins (PubMed:17018530, PubMed:28065600).
Catalyzes the post-translational oxidative deamination of peptidyl lysine residues in precursors of elastin and different types of collagens, a prerequisite in the formation of cross-links between collagens and elastin (PubMed:17018530).
Required for somite boundary formation by catalyzing oxidation of fibronectin (FN1), enhancing integrin signaling in myofibers and their adhesion to the myotendinous junction (MTJ) (By similarity).
Acts as a regulator of inflammatory response by inhibiting differentiation of naive CD4(+) T-cells into T-helper Th17 or regulatory T-cells (Treg): acts by interacting with STAT3 in the nucleus and catalyzing both deacetylation and oxidation of lysine residues on STAT3, leading to disrupt STAT3 dimerization and inhibit STAT3 transcription activity (PubMed:28065600).
Oxidation of lysine residues to allysine on STAT3 preferentially takes place on lysine residues that are acetylated (PubMed:28065600).
Also able to catalyze deacetylation of lysine residues on STAT3 (PubMed:28065600).
; Isoform 1: Shows protein-lysine 6-oxidase activity toward elastin and different types of collagens, with the highest activity toward collagen type VIII (PubMed:17018530).
; Isoform 2: Shows protein-lysine 6-oxidase activity toward elastin and different types of collagens, with the highest activity toward collagen type IV (PubMed:17018530)".
8 P30203 T-cell differentiation antigen CD6 668"Cell adhesion molecule that mediates cell-cell contacts and regulates T-cell responses via its interaction with ALCAM/CD166 (PubMed:15048703, PubMed:15294938, PubMed:16352806, PubMed:16914752, PubMed:24945728, PubMed:24584089).
Contributes to signaling cascades triggered by activation of the TCR/CD3 complex (PubMed:24584089).
Functions as costimulatory molecule; promotes T-cell activation and proliferation (PubMed:15294938, PubMed:16352806, PubMed:16914752).
Contributes to the formation and maturation of the immunological synapse (PubMed:15294938, PubMed:16352806).
Functions as calcium-dependent pattern receptor that binds and aggregates both Gram-positive and Gram-negative bacteria.
Binds both lipopolysaccharide (LPS) from Gram-negative bacteria and lipoteichoic acid from Gram-positive bacteria (PubMed:17601777).
LPS binding leads to the activation of signaling cascades and down-stream MAP kinases (PubMed:17601777).
Mediates activation of the inflammatory response and the secretion of pro-inflammatory cytokines in response to LPS (PubMed:17601777)".
9 Q86VB7 Scavenger receptor cysteine-rich type 1 protein M130 1156"Acute phase-regulated receptor involved in clearance and endocytosis of hemoglobin/haptoglobin complexes by macrophages and may thereby protect tissues from free hemoglobin-mediated oxidative damage.
May play a role in the uptake and recycling of iron, via endocytosis of hemoglobin/haptoglobin and subsequent breakdown of heme.
Binds hemoglobin/haptoglobin complexes in a calcium-dependent and pH-dependent manner.
Exhibits a higher affinity for complexes of hemoglobin and multimeric haptoglobin of HP*1F phenotype than for complexes of hemoglobin and dimeric haptoglobin of HP*1S phenotype.
Induces a cascade of intracellular signals that involves tyrosine kinase-dependent calcium mobilization, inositol triphosphate production and secretion of IL6 and CSF1.
Isoform 3 exhibits the higher capacity for ligand endocytosis and the more pronounced surface expression when expressed in cells.
; After shedding, the soluble form (sCD163) may play an anti-inflammatory role, and may be a valuable diagnostic parameter for monitoring macrophage activation in inflammatory conditions".
10 Q9Y4K0 Lysyl oxidase homolog 2 774"Mediates the post-translational oxidative deamination of lysine residues on target proteins leading to the formation of deaminated lysine (allysine) (PubMed:27735137).
Acts as a transcription corepressor and specifically mediates deamination of trimethylated 'Lys-4' of histone H3 (H3K4me3), a specific tag for epigenetic transcriptional activation (PubMed:27735137).
Shows no activity against histone H3 when it is trimethylated on 'Lys-9' (H3K9me3) or 'Lys-27' (H3K27me3) or when 'Lys-4' is monomethylated (H3K4me1) or dimethylated (H3K4me2) (PubMed:27735137).
Also mediates deamination of methylated TAF10, a member of the transcription factor IID (TFIID) complex, which induces release of TAF10 from promoters, leading to inhibition of TFIID-dependent transcription (PubMed:25959397).
LOXL2-mediated deamination of TAF10 results in transcriptional repression of genes required for embryonic stem cell pluripotency including POU5F1/OCT4, NANOG, KLF4 and SOX2 (By similarity).
Involved in epithelial to mesenchymal transition (EMT) via interaction with SNAI1 and participates in repression of E-cadherin CDH1, probably by mediating deamination of histone H3 (PubMed:16096638, PubMed:27735137, PubMed:24414204).
During EMT, involved with SNAI1 in negatively regulating pericentromeric heterochromatin transcription (PubMed:24239292).
SNAI1 recruits LOXL2 to pericentromeric regions to oxidize histone H3 and repress transcription which leads to release of heterochromatin component CBX5/HP1A, enabling chromatin reorganization and acquisition of mesenchymal traits (PubMed:24239292).
Interacts with the endoplasmic reticulum protein HSPA5 which activates the IRE1-XBP1 pathway of the unfolded protein response, leading to expression of several transcription factors involved in EMT and subsequent EMT induction (PubMed:28332555).
Involved in E-cadherin repression following hypoxia, a hallmark of EMT believed to amplify tumor aggressiveness, suggesting that it may play a role in tumor progression (PubMed:20026874).
When secreted into the extracellular matrix, promotes cross-linking of extracellular matrix proteins by mediating oxidative deamination of peptidyl lysine residues in precursors to fibrous collagen and elastin (PubMed:20306300).
Acts as a regulator of sprouting angiogenesis, probably via collagen IV scaffolding (PubMed:21835952).
Acts as a regulator of chondrocyte differentiation, probably by regulating expression of factors that control chondrocyte differentiation (By similarity)".
11 P56730 Neurotrypsin 875Plays a role in neuronal plasticity and the proteolytic action may subserve structural reorganizations associated with learning and memory operations.