InnateDB: Systems Biology of the Innate Immune Response

Homo sapiens Protein: SIGLEC1

Summary

InnateDB Protein

IDBP-47697.6

Last Modified

2014-10-13 [Report errors or provide feedback]

Gene Symbol

SIGLEC1

Protein Name

sialic acid binding Ig-like lectin 1, sialoadhesin

Synonyms

CD169; dJ1009E24.1; SIGLEC-1; SN;

Species

Homo sapiens

Ensembl Protein

ENSP00000341141

InnateDB Gene

IDBG-47695 (SIGLEC1)

Protein Structure

UniProt Annotation

Function

Acts as an endocytic receptor mediating clathrin dependent endocytosis. Macrophage-restricted adhesion molecule that mediates sialic-acid dependent binding to lymphocytes, including granulocytes, monocytes, natural killer cells, B-cells and CD8 T-cells. Preferentially binds to alpha-2,3-linked sialic acid (By similarity). Binds to SPN/CD43 on T-cells (By similarity). May play a role in hemopoiesis. {ECO:0000250}.

Subcellular Localization

Isoform 1: Cell membrane; Single-pass type I membrane protein.Isoform 2: Secreted.

Disease Associations

Tissue Specificity

Expressed by macrophages in various tissues. High levels are found in spleen, lymph node, perivascular macrophages in brain and lower levels in bone marrow, liver Kupffer cells and lamina propria of colon and lung. Also expressed by inflammatory macrophages in rheumatoid arthritis.

Comments

Interactions

Number of Interactions

This gene and/or its encoded proteins are associated with 0 experimentally validated interaction(s) in this database.
They are also associated with 2 interaction(s) predicted by orthology.

Predicted by orthology
Total	2 [view]

Gene Ontology

Molecular Function

Accession	GO Term
GO:0005515	protein binding
GO:0030246	carbohydrate binding

Biological Process

GO:0006897	endocytosis
GO:0006954	inflammatory response
GO:0007160	cell-matrix adhesion
GO:0016337	single organismal cell-cell adhesion
GO:0045087	innate immune response (InnateDB)
GO:0070234	positive regulation of T cell apoptotic process
GO:2001238	positive regulation of extrinsic apoptotic signaling pathway

Cellular Component

GO:0005576	extracellular region
GO:0005886	plasma membrane
GO:0016021	integral component of membrane

Protein Structure and Domains

PDB ID

InterPro

IPR003598 Immunoglobulin subtype 2
IPR003599 Immunoglobulin subtype
IPR007110 Immunoglobulin-like domain
IPR013098 Immunoglobulin I-set
IPR013106 Immunoglobulin V-set domain
IPR013151 Immunoglobulin
IPR013162 CD80-like, immunoglobulin C2-set

PFAM

PF07679
PF07686
PF00047
PF08205

PRINTS

PIRSF

SMART

SM00408
SM00409

TIGRFAMs

Post-translational Modifications

Modification

Cross-References

SwissProt

Q9BZZ2