Laptm4b lysosomal-associated protein transmembrane 4B [Mus musculus (house mouse)] - Gene

Summary

Official Symbol: Laptm4bprovided by MGI
Official Full Name: lysosomal-associated protein transmembrane 4Bprovided by MGI
Primary source: MGI:MGI:1890494
See related: Ensembl:ENSMUSG00000022257 AllianceGenome:MGI:1890494
Gene type: protein coding
RefSeq status: VALIDATED
Organism: Mus musculus
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea; Muridae; Murinae; Mus; Mus
Also known as: LAPTM4beta; C330023P13Rik
Summary: Predicted to enable ceramide binding activity; enzyme binding activity; and phosphatidylinositol bisphosphate binding activity. Predicted to be involved in several processes, including endosome transport via multivesicular body sorting pathway; negative regulation of macromolecule metabolic process; and regulation of lysosomal membrane permeability. Predicted to be located in several cellular components, including endosome; lysosome; and plasma membrane. Predicted to be active in lysosomal membrane. Is expressed in several structures, including central nervous system; incisor; liver; retina; and submandibular gland primordium. Orthologous to human LAPTM4B (lysosomal protein transmembrane 4 beta). [provided by Alliance of Genome Resources, Jul 2025]
Expression: Ubiquitous expression in adrenal adult (RPKM 150.7), ovary adult (RPKM 83.2) and 24 other tissues See more
Orthologs: human all
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Genomic context

Location:: 15 B3.1; 15 13.98 cM

Exon count:: 7

Annotation release	Status	Assembly	Chr	Location
RS_2024_02	current	GRCm39 (GCF_000001635.27)	15	NC_000081.7 (34238279..34284448)
108.20200622	previous assembly	GRCm38.p6 (GCF_000001635.26)	15	NC_000081.6 (34238026..34284295)

Chromosome 15 - NC_000081.7 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: Mouse ENCODE transcriptome data
Description: RNA profiling data sets generated by the Mouse ENCODE project.
BioProject: PRJNA66167
Publication: PMID 25409824
Analysis date: n/a

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

[Effect of Laptm4b Deletion on Hematopoietic Stem and Progenitor Cells Homeostasis in Mice].
Title: [Effect of Laptm4b Deletion on Hematopoietic Stem and Progenitor Cells Homeostasis in Mice].
Downregulation of LAPTM4B Contributes to the Impairment of the Autophagic Flux via Unopposed Activation of mTORC1 Signaling During Myocardial Ischemia/Reperfusion Injury.
Title: Downregulation of LAPTM4B Contributes to the Impairment of the Autophagic Flux via Unopposed Activation of mTORC1 Signaling During Myocardial Ischemia/Reperfusion Injury.
The results suggest that while some requisites of LAPTM5 lysosomal sorting are conserved among LAPTM4 proteins, LAPTM4a and LAPTM4b have also developed distinct sorting requirements.
Title: A role for the ubiquitin ligase Nedd4 in membrane sorting of LAPTM4 proteins.
A potential protooncogene whose overexpression is involved in carcinogenesis and progression of hepatocellular carcinoma
Title: Molecular cloning and characterization of LAPTM4B, a novel gene upregulated in hepatocellular carcinoma.

Submit: New GeneRIF Correction

Variation

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Alleles

Alleles of this type are documented at Mouse Genome Informatics (MGI)

Endonuclease-mediated (5) 1 citation
Targeted (2)

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Gene Ontology Provided by MGI

Function	Evidence Code	Pubs
enables ceramide binding	IEA Inferred from Electronic Annotation more info
enables ceramide binding	ISO Inferred from Sequence Orthology more info
enables ceramide binding	ISS Inferred from Sequence or Structural Similarity more info
enables kinase binding	IEA Inferred from Electronic Annotation more info
enables kinase binding	ISO Inferred from Sequence Orthology more info
enables phosphatidylinositol bisphosphate binding	IEA Inferred from Electronic Annotation more info
enables phosphatidylinositol bisphosphate binding	ISO Inferred from Sequence Orthology more info
enables phosphatidylinositol bisphosphate binding	ISS Inferred from Sequence or Structural Similarity more info
enables ubiquitin protein ligase binding	IEA Inferred from Electronic Annotation more info
enables ubiquitin protein ligase binding	ISO Inferred from Sequence Orthology more info

Process	Evidence Code	Pubs
involved_in endosome organization	IEA Inferred from Electronic Annotation more info
involved_in endosome organization	ISO Inferred from Sequence Orthology more info
involved_in endosome organization	ISS Inferred from Sequence or Structural Similarity more info
involved_in endosome transport via multivesicular body sorting pathway	IEA Inferred from Electronic Annotation more info
involved_in endosome transport via multivesicular body sorting pathway	ISO Inferred from Sequence Orthology more info
involved_in endosome transport via multivesicular body sorting pathway	ISS Inferred from Sequence or Structural Similarity more info
involved_in negative regulation of lysosomal protein catabolic process	IEA Inferred from Electronic Annotation more info
involved_in negative regulation of lysosomal protein catabolic process	ISO Inferred from Sequence Orthology more info
involved_in negative regulation of lysosomal protein catabolic process	ISS Inferred from Sequence or Structural Similarity more info
involved_in negative regulation of transforming growth factor beta1 production	IEA Inferred from Electronic Annotation more info
involved_in negative regulation of transforming growth factor beta1 production	ISO Inferred from Sequence Orthology more info
involved_in negative regulation of transforming growth factor beta1 production	ISS Inferred from Sequence or Structural Similarity more info
involved_in regulation of lysosomal membrane permeability	IBA Inferred from Biological aspect of Ancestor more info
involved_in regulation of lysosomal membrane permeability	IEA Inferred from Electronic Annotation more info
involved_in regulation of lysosomal membrane permeability	ISO Inferred from Sequence Orthology more info
involved_in regulation of lysosomal membrane permeability	ISS Inferred from Sequence or Structural Similarity more info
involved_in regulation of lysosome organization	IEA Inferred from Electronic Annotation more info
involved_in regulation of lysosome organization	ISO Inferred from Sequence Orthology more info
involved_in regulation of lysosome organization	ISS Inferred from Sequence or Structural Similarity more info

Component	Evidence Code	Pubs
located_in cell projection	IEA Inferred from Electronic Annotation more info
located_in cell projection	ISO Inferred from Sequence Orthology more info
located_in cell projection	ISS Inferred from Sequence or Structural Similarity more info
located_in early endosome	IEA Inferred from Electronic Annotation more info
located_in early endosome	ISO Inferred from Sequence Orthology more info
located_in early endosome	ISS Inferred from Sequence or Structural Similarity more info
located_in endomembrane system	IEA Inferred from Electronic Annotation more info
located_in endosome	IEA Inferred from Electronic Annotation more info
located_in endosome	ISO Inferred from Sequence Orthology more info
located_in endosome	ISS Inferred from Sequence or Structural Similarity more info
located_in endosome membrane	IEA Inferred from Electronic Annotation more info
located_in late endosome membrane	IEA Inferred from Electronic Annotation more info
located_in late endosome membrane	ISO Inferred from Sequence Orthology more info
located_in late endosome membrane	ISS Inferred from Sequence or Structural Similarity more info
is_active_in lysosomal membrane	IBA Inferred from Biological aspect of Ancestor more info
located_in lysosomal membrane	IEA Inferred from Electronic Annotation more info
located_in lysosomal membrane	ISO Inferred from Sequence Orthology more info
located_in lysosomal membrane	ISS Inferred from Sequence or Structural Similarity more info
located_in lysosome	IEA Inferred from Electronic Annotation more info
located_in lysosome	ISO Inferred from Sequence Orthology more info
located_in lysosome	ISS Inferred from Sequence or Structural Similarity more info
located_in membrane	IEA Inferred from Electronic Annotation more info
located_in multivesicular body membrane	IEA Inferred from Electronic Annotation more info
located_in multivesicular body membrane	ISO Inferred from Sequence Orthology more info
located_in multivesicular body membrane	ISS Inferred from Sequence or Structural Similarity more info
located_in multivesicular body, internal vesicle	IEA Inferred from Electronic Annotation more info
located_in multivesicular body, internal vesicle	ISO Inferred from Sequence Orthology more info
located_in multivesicular body, internal vesicle	ISS Inferred from Sequence or Structural Similarity more info
located_in plasma membrane	IEA Inferred from Electronic Annotation more info
located_in plasma membrane	ISO Inferred from Sequence Orthology more info
located_in plasma membrane	ISS Inferred from Sequence or Structural Similarity more info

General protein information

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Preferred Names: lysosomal-associated transmembrane protein 4B

Names: lysosomal-associated transmembrane protein 4

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.