KIR2DL3

Protein identityUniProt · HPA

UniProt accession

P43628

Gene

KIR2DL3

Ensembl

ENSG00000243772

Chromosome

19

Canonical length

341 aa

Protein class

CD markers, Predicted membrane proteins

OverviewNCBI Gene

Killer cell immunoglobulin-like receptors (KIRs) are transmembrane glycoproteins expressed by natural killer cells and subsets of T cells. The KIR genes are polymorphic and highly homologous and they are found in a cluster on chromosome 19q13.4 within the 1 Mb leukocyte receptor complex (LRC). The gene content of the KIR gene cluster varies among haplotypes, although several """"""""""""""""""""""""""""""""framework"""""""""""""""""""""""""""""""" genes are found in all haplotypes (KIR3DL3, KIR3DP1, KIR3DL4, KIR3DL2). The KIR proteins are classified by the number of extracellular immunoglobulin domains (2D or 3D) and by whether they have a long (L) or short (S) cytoplasmic domain. KIR proteins with the long cytoplasmic domain transduce inhibitory signals upon ligand binding via an immune tyrosine-based inhibitory motif (ITIM), while KIR proteins with the short cytoplasmic domain lack the ITIM motif and instead associate with the TYRO protein tyrosine kinase binding protein to transduce activating signals. The ligands for several KIR proteins are subsets of HLA class I molecules; thus, KIR proteins are thought to play an important role in regulation of the immune response. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

341 residues, UniProt reviewed canonical sequence.

>P43628|KIR2DL3
     1  MSLMVVSMVC VGFFLLQGAW PHEGVHRKPS LLAHPGPLVK SEETVILQCW SDVRFQHFLL
    61  HREGKFKDTL HLIGEHHDGV SKANFSIGPM MQDLAGTYRC YGSVTHSPYQ LSAPSDPLDI
   121  VITGLYEKPS LSAQPGPTVL AGESVTLSCS SRSSYDMYHL SREGEAHERR FSAGPKVNGT
   181  FQADFPLGPA THGGTYRCFG SFRDSPYEWS NSSDPLLVSV TGNPSNSWPS PTEPSSETGN
   241  PRHLHVLIGT SVVIILFILL LFFLLHRWCC NKKNAVVMDQ EPAGNRTVNR EDSDEQDPQE
   301  VTYAQLNHCV FTQRKITRPS QRPKTPPTDI IVYTELPNAE P

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against KIR2DL3 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)

0.44

Highest tissue expression

1.4 nTPM

Expression across tissuesHPA

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)

1.61

gnomAD pLI

0

gnomAD missense Z

-1.68

DepMap mean gene effect

0.08

DepMap dependency class

none

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

• immune response
• immune response-regulating signaling pathway

Molecular functions

• antigen binding
• identical protein binding
• signaling receptor activity

Cellular components

• membrane
• plasma membrane

Protein domainsUniProt · Pfam · InterPro

• Immunoglobulin domain subtype
• Immunoglobulin-like beta-sandwich domain
• Immunoglobulin-like fold
• Immunoglobulin-like domain superfamily
• Immunoglobulin-like Receptors in Immune Regulation
• Immunoglobulin domain

KeywordsUniProt

• Cell membrane
• Disulfide bond
• Glycoprotein
• Immunoglobulin domain
• Membrane
• Receptor
• Repeat
• Signal
• Transmembrane
• Transmembrane helix

InteractionsUniProt · HPA

Protein binding partners of KIR2DL3 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.

• ARRB2
• HLA-B
• HLA-C