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Protein

Linker for activation of T-cells family member 1

Gene

Lat

Organism
Mus musculus (Mouse)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Required for TCR (T-cell antigen receptor)- and pre-TCR-mediated signaling, both in mature T-cells and during their development. Involved in FCGR3 (low affinity immunoglobulin gamma Fc region receptor III)-mediated signaling in natural killer cells and FCER1 (high affinity immunoglobulin epsilon receptor)-mediated signaling in mast cells. Couples activation of these receptors and their associated kinases with distal intracellular events such as mobilization of intracellular calcium stores, PKC activation, MAPK activation or cytoskeletal reorganization through the recruitment of PLCG1, GRB2, GRAP2, and other signaling molecules.1 Publication

Miscellaneous

Engagement of killer inhibitory receptors (KIR) disrupts the interaction of PLCG1 with LAT and blocks target cell-induced activation of PLC, maybe by inducing the dephosphorylation of LAT.By similarity

GO - Molecular functioni

GO - Biological processi

  • adaptive immune response Source: UniProtKB-KW
  • calcium-mediated signaling Source: HGNC
  • cellular defense response Source: MGI
  • gene expression Source: MGI
  • homeostasis of number of cells Source: MGI
  • immune response Source: HGNC
  • inflammatory response Source: MGI
  • integrin-mediated signaling pathway Source: HGNC
  • intracellular signal transduction Source: HGNC
  • lymphocyte homeostasis Source: MGI
  • mast cell degranulation Source: UniProtKB-KW
  • positive regulation of protein kinase activity Source: Ensembl
  • Ras protein signal transduction Source: HGNC
  • regulation of T cell activation Source: HGNC
  • transmembrane receptor protein tyrosine kinase signaling pathway Source: MGI

Keywordsi

Biological processAdaptive immunity, Immunity, Mast cell degranulation

Enzyme and pathway databases

ReactomeiR-MMU-114604. GPVI-mediated activation cascade.
R-MMU-202433. Generation of second messenger molecules.
R-MMU-2424491. DAP12 signaling.
R-MMU-2454202. Fc epsilon receptor (FCERI) signaling.
R-MMU-2871796. FCERI mediated MAPK activation.
R-MMU-2871809. FCERI mediated Ca+2 mobilization.
R-MMU-5673001. RAF/MAP kinase cascade.

Names & Taxonomyi

Protein namesi
Recommended name:
Linker for activation of T-cells family member 1
Alternative name(s):
36 kDa phospho-tyrosine adapter protein
Short name:
pp36
p36-38
Gene namesi
Name:Lat
OrganismiMus musculus (Mouse)
Taxonomic identifieri10090 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
Proteomesi
  • UP000000589 Componenti: Chromosome 7

Organism-specific databases

MGIiMGI:1342293. Lat.

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 4ExtracellularSequence analysis4
Transmembranei5 – 28Helical; Signal-anchor for type III membrane proteinSequence analysisAdd BLAST24
Topological domaini29 – 242CytoplasmicSequence analysisAdd BLAST214

Keywords - Cellular componenti

Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000833261 – 242Linker for activation of T-cells family member 1Add BLAST242

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Lipidationi27S-palmitoyl cysteine1 Publication1
Lipidationi30S-palmitoyl cysteine1 Publication1
Modified residuei40PhosphothreonineBy similarity1
Modified residuei41PhosphoserineCombined sources1
Modified residuei44PhosphoserineCombined sources1
Modified residuei87PhosphoserineBy similarity1
Modified residuei104PhosphoserineBy similarity1
Modified residuei109PhosphoserineCombined sources1
Modified residuei112PhosphoserineCombined sources1
Modified residuei175PhosphotyrosineBy similarity1
Modified residuei199PhosphoserineCombined sources1
Modified residuei212PhosphoserineCombined sources1
Modified residuei215PhosphoserineCombined sources1
Modified residuei235PhosphotyrosineBy similarity1

Post-translational modificationi

Phosphorylated on tyrosines by ZAP70 upon TCR activation, or by SYK upon other immunoreceptor activation; which leads to the recruitment of multiple signaling molecules. Is one of the most prominently tyrosine-phosphorylated proteins detected following TCR engagement. May be dephosphorylated by PTPRJ. Phosphorylated by ITK leading to the recruitment of VAV1 to LAT-containing complexes (By similarity).By similarity
Palmitoylation of Cys-27 and Cys-30 is required for raft targeting and efficient phosphorylation.By similarity

Keywords - PTMi

Lipoprotein, Palmitate, Phosphoprotein

Proteomic databases

EPDiO54957.
PaxDbiO54957.
PRIDEiO54957.

PTM databases

iPTMnetiO54957.
PhosphoSitePlusiO54957.
SwissPalmiO54957.

Expressioni

Tissue specificityi

Expressed in T-cells and mast cells.1 Publication

Gene expression databases

BgeeiENSMUSG00000030742.
CleanExiMM_LAT.
ExpressionAtlasiO54957. baseline and differential.
GenevisibleiO54957. MM.

Interactioni

Subunit structurei

When phosphorylated, interacts directly with the PIK3R1 subunit of phosphoinositide 3-kinase and the SH2 domains of GRB2, GRAP, GRAP2, PLCG1 and PLCG2. Interacts indirectly with CBL, SOS, VAV, and LCP2. Interacts with SHB and SKAP2. Interacts with FCGR1A (By similarity). Interacts with CLNK. Interacts with GRB2, PLCG1 and THEMIS upon TCR activation in thymocytes.By similarity2 Publications

Binary interactionsi

Show more details

GO - Molecular functioni

Protein-protein interaction databases

BioGridi201112. 2 interactors.
ELMiO54957.
IntActiO54957. 58 interactors.
MINTiMINT-8202415.
STRINGi10090.ENSMUSP00000032997.

Structurei

3D structure databases

ProteinModelPortaliO54957.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni136 – 139Interaction with PLCG1By similarity4
Regioni175 – 178Interaction with GRB2, GRAP2 and PIK3R1By similarity4
Regioni195 – 198Interaction with GRB2, GRAP2 and PIK3R1By similarity4

Keywords - Domaini

Signal-anchor, Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG410IW3X. Eukaryota.
ENOG4111EFT. LUCA.
GeneTreeiENSGT00390000014223.
HOGENOMiHOG000081810.
HOVERGENiHBG018198.
InParanoidiO54957.
KOiK07362.
OMAiGSHRMPS.
OrthoDBiEOG091G0QKO.
PhylomeDBiO54957.
TreeFamiTF337741.

Family and domain databases

InterProiView protein in InterPro
IPR008359. Linker_for_activat_Tcells_prot.
PANTHERiPTHR15586. PTHR15586. 2 hits.
PfamiView protein in Pfam
PF15234. LAT. 1 hit.
PRINTSiPR01781. LATPROTEIN.

Sequencei

Sequence statusi: Complete.

O54957-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MEADALSPVG LGLLLLPFLV TLLAALCVRC RELPVSYDST STESLYPRSI
60 70 80 90 100
LIKPPQITVP RTPAVSYPLV TSFPPLRQPD LLPIPRSPQP LGGSHRMPSS
110 120 130 140 150
QQNSDDANSV ASYENQEPAC KNVDADEDED DYPNGYLVVL PDSSPAAVPV
160 170 180 190 200
VSSAPVPSNP DLGDSAFSVE SCEDYVNVPE SEESAEASLD GSREYVNVSP
210 220 230 240
EQQPVTRAEL ASVNSQEVED EGEEEGVDGE EAPDYENLQE LN
Length:242
Mass (Da):26,015
Last modified:June 1, 1998 - v1
Checksum:i6AC25F7AE6E1A5C1
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF036907 mRNA. Translation: AAC40054.1.
BC013337 mRNA. Translation: AAH13337.1.
CCDSiCCDS21825.1.
RefSeqiNP_034819.1. NM_010689.3.
UniGeneiMm.10280.

Genome annotation databases

EnsembliENSMUST00000032997; ENSMUSP00000032997; ENSMUSG00000030742.
GeneIDi16797.
KEGGimmu:16797.
UCSCiuc009jqx.1. mouse.

Similar proteinsi

Entry informationi

Entry nameiLAT_MOUSE
AccessioniPrimary (citable) accession number: O54957
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 1, 2001
Last sequence update: June 1, 1998
Last modified: October 25, 2017
This is version 140 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot