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SAR1B secretion associated Ras related GTPase 1B [ Homo sapiens (human) ]

Gene ID: 51128, updated on 23-Dec-2018

Summary

Official Symbol
SAR1Bprovided by HGNC
Official Full Name
secretion associated Ras related GTPase 1Bprovided by HGNC
Primary source
HGNC:HGNC:10535
See related
Ensembl:ENSG00000152700 MIM:607690
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
ANDD; CMRD; GTBPB; SARA2
Summary
The protein encoded by this gene is a small GTPase that acts as a homodimer. The encoded protein is activated by the guanine nucleotide exchange factor PREB and is involved in protein transport from the endoplasmic reticulum to the Golgi. This protein is part of the COPII coat complex. Defects in this gene are a cause of chylomicron retention disease (CMRD), also known as Anderson disease (ANDD). Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Mar 2010]
Expression
Ubiquitous expression in liver (RPKM 17.3), small intestine (RPKM 16.1) and 25 other tissues See more
Orthologs

Genomic context

See SAR1B in Genome Data Viewer
Location:
5q31.1
Exon count:
8
Annotation release Status Assembly Chr Location
109 current GRCh38.p12 (GCF_000001405.38) 5 NC_000005.10 (134601149..134632843, complement)
105 previous assembly GRCh37.p13 (GCF_000001405.25) 5 NC_000005.9 (133936839..133968533, complement)

Chromosome 5 - NC_000005.10Genomic Context describing neighboring genes Neighboring gene uncharacterized LOC107986451 Neighboring gene RNA, 7SL, cytoplasmic 541, pseudogene Neighboring gene jade family PHD finger 2 Neighboring gene HNF4 motif-containing MPRA enhancer 267 Neighboring gene RNA, U6 small nuclear 1311, pseudogene Neighboring gene SEC24 homolog A, COPII coat complex component Neighboring gene RNA, U6 small nuclear 1164, pseudogene

Genomic regions, transcripts, and products

Expression

  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

GeneRIFs: Gene References Into FunctionsWhat's a GeneRIF?

Pathways from BioSystems

  • Adaptive Immune System, organism-specific biosystem (from REACTOME)
    Adaptive Immune System, organism-specific biosystemAdaptive immunity refers to antigen-specific immune response efficiently involved in clearing the pathogens. The adaptive immune system is comprised of B and T lymphocytes that express receptors with...
  • Antigen Presentation: Folding, assembly and peptide loading of class I MHC, organism-specific biosystem (from REACTOME)
    Antigen Presentation: Folding, assembly and peptide loading of class I MHC, organism-specific biosystemUnlike other glycoproteins, correct folding of MHC class I molecules is not sufficient to trigger their exit from the ER, they exit only after peptide loading. Described here is the process of antige...
  • Asparagine N-linked glycosylation, organism-specific biosystem (from REACTOME)
    Asparagine N-linked glycosylation, organism-specific biosystemN-linked glycosylation is the most important form of post-translational modification for proteins synthesized and folded in the Endoplasmic Reticulum (Stanley et al. 2009). An early study in 1999 rev...
  • COPII (Coat Protein 2) Mediated Vesicle Transport, organism-specific biosystem (from REACTOME)
    COPII (Coat Protein 2) Mediated Vesicle Transport, organism-specific biosystemCOPII components (known as Sec13p, Sec23p, Sec24p, Sec31p, and Sar1p in yeast) traffic cargo from the endoplasmic reticulum to the ER-Golgi intermediate compartment (ERGIC). COPII-coated vesicles wer...
  • COPII complex, organism-specific biosystem (from KEGG)
    COPII complex, organism-specific biosystemStructural complex; Genetic information processing; Protein processing
  • COPII complex, conserved biosystem (from KEGG)
    COPII complex, conserved biosystemStructural complex; Genetic information processing; Protein processing
  • Cargo concentration in the ER, organism-specific biosystem (from REACTOME)
    Cargo concentration in the ER, organism-specific biosystemComputational analysis suggests that ~25% of the proteome may be exported from the ER in human cells (Kanapin et al, 2003). These cargo need to be recognized and concentrated into COPII vesicles, wh...
  • Chylomicron-mediated lipid transport, organism-specific biosystem (from REACTOME)
    Chylomicron-mediated lipid transport, organism-specific biosystemChylomicrons transport triacylglycerol, phospholipid, and cholesterol derived from dietary lipid from the small intestine to other tissues of the body. Each chylomicron assembles around a single mole...
  • Class I MHC mediated antigen processing & presentation, organism-specific biosystem (from REACTOME)
    Class I MHC mediated antigen processing & presentation, organism-specific biosystemMajor histocompatibility complex (MHC) class I molecules play an important role in cell mediated immunity by reporting on intracellular events such as viral infection, the presence of intracellular b...
  • ER to Golgi Anterograde Transport, organism-specific biosystem (from REACTOME)
    ER to Golgi Anterograde Transport, organism-specific biosystemSecretory cargo destined to be secreted or to arrive at the plasma membrane (PM) leaves the ER via distinct exit sites. This cargo is destined for the Golgi apparatus for further processing.
  • Immune System, organism-specific biosystem (from REACTOME)
    Immune System, organism-specific biosystemHumans are exposed to millions of potential pathogens daily, through contact, ingestion, and inhalation. Our ability to avoid infection depends on the adaptive immune system and during the first crit...
  • Legionellosis, organism-specific biosystem (from KEGG)
    Legionellosis, organism-specific biosystemLegionellosis is a potentially fatal infectious disease caused by the bacterium Legionella pneumophila and other legionella species. Two distinct clinical and epidemiological syndromes are associated...
  • Legionellosis, conserved biosystem (from KEGG)
    Legionellosis, conserved biosystemLegionellosis is a potentially fatal infectious disease caused by the bacterium Legionella pneumophila and other legionella species. Two distinct clinical and epidemiological syndromes are associated...
  • Lipid digestion, mobilization, and transport, organism-specific biosystem (from REACTOME)
    Lipid digestion, mobilization, and transport, organism-specific biosystemProcesses annotated here include the digestion of dietary lipids, sterol uptake, the formation and turnover of lipoproteins (chylomicrons, VLDL, LDL, and HDL), and the mobilization of fatty acids thr...
  • Lipoprotein metabolism, organism-specific biosystem (from REACTOME)
    Lipoprotein metabolism, organism-specific biosystemBecause of their hydrophobicity, lipids are found in the extracellular spaces of the human body primarily in the form of lipoprotein complexes. Chylomicrons form in the small intestine and transport ...
  • MHC class II antigen presentation, organism-specific biosystem (from REACTOME)
    MHC class II antigen presentation, organism-specific biosystemAntigen presenting cells (APCs) such as B cells, dendritic cells (DCs) and monocytes/macrophages express major histocompatibility complex class II molecules (MHC II) at their surface and present exog...
  • Membrane Trafficking, organism-specific biosystem (from REACTOME)
    Membrane Trafficking, organism-specific biosystemThe secretory membrane system allows a cell to regulate delivery of newly synthesized proteins, carbohydrates, and lipids to the cell surface, a necessity for growth and homeostasis. The system is ma...
  • Metabolism, organism-specific biosystem (from REACTOME)
    Metabolism, organism-specific biosystemMetabolic processes in human cells generate energy through the oxidation of molecules consumed in the diet and mediate the synthesis of diverse essential molecules not taken in the diet as well as th...
  • Metabolism of lipids and lipoproteins, organism-specific biosystem (from REACTOME)
    Metabolism of lipids and lipoproteins, organism-specific biosystemLipids are hydrophobic but otherwise chemically diverse molecules that play a wide variety of roles in human biology. They include ketone bodies, fatty acids, triacylglycerols, phospholipids and sphi...
  • Metabolism of proteins, organism-specific biosystem (from REACTOME)
    Metabolism of proteins, organism-specific biosystemProtein metabolism comprises the pathways of translation, post-translational modification and protein folding.
  • Post-translational protein modification, organism-specific biosystem (from REACTOME)
    Post-translational protein modification, organism-specific biosystemAfter translation, many newly formed proteins undergo further covalent modifications that alter their functional properties and that are essentially irreversible under physiological conditions in the...
  • Protein processing in endoplasmic reticulum, organism-specific biosystem (from KEGG)
    Protein processing in endoplasmic reticulum, organism-specific biosystemThe endoplasmic reticulum (ER) is a subcellular organelle where proteins are folded with the help of lumenal chaperones. Newly synthesized peptides enter the ER via the sec61 pore and are glycosylate...
  • Protein processing in endoplasmic reticulum, conserved biosystem (from KEGG)
    Protein processing in endoplasmic reticulum, conserved biosystemThe endoplasmic reticulum (ER) is a subcellular organelle where proteins are folded with the help of lumenal chaperones. Newly synthesized peptides enter the ER via the sec61 pore and are glycosylate...
  • Regulation of cholesterol biosynthesis by SREBP (SREBF), organism-specific biosystem (from REACTOME)
    Regulation of cholesterol biosynthesis by SREBP (SREBF), organism-specific biosystemSterol regulatory element binding proteins (SREBPs, SREBFs) respond to low cholesterol concentrations by transiting to the nucleus and activating genes involved in cholesterol and lipid biosynthesis ...
  • Sterol Regulatory Element-Binding Proteins (SREBP) signalling, organism-specific biosystem (from WikiPathways)
    Sterol Regulatory Element-Binding Proteins (SREBP) signalling, organism-specific biosystemSterol regulatory element-binding proteins (SREBPs) are membrane-bound proteins that act as transcription factors. They regulate lipid, especially cholesterol, biosynthesis and uptake at a transcript...
  • Transport to the Golgi and subsequent modification, organism-specific biosystem (from REACTOME)
    Transport to the Golgi and subsequent modification, organism-specific biosystemAt least two mechanisms of transport of proteins from the ER to the Golgi have been described. One is a general flow requiring no export signals (Wieland et al, 1987; Martinez-Menarguez et al, 1999)....
  • Vesicle-mediated transport, organism-specific biosystem (from REACTOME)
    Vesicle-mediated transport, organism-specific biosystemThe transit of proteins and other cargo through the cell requires a cellular transport process in which transported substances are moved in membrane-bounded vesicles. Transported substances are enclo...

Interactions

Products Interactant Other Gene Complex Source Pubs Description

General gene information

Markers

Homology

Gene Ontology Provided by GOA

Function Evidence Code Pubs
GTP binding IEA
Inferred from Electronic Annotation
more info
 
GTPase activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
GTPase activity TAS
Traceable Author Statement
more info
 
metal ion binding IEA
Inferred from Electronic Annotation
more info
 
Process Evidence Code Pubs
COPII vesicle coating TAS
Traceable Author Statement
more info
 
ER to Golgi vesicle-mediated transport IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
ER to Golgi vesicle-mediated transport TAS
Traceable Author Statement
more info
 
antigen processing and presentation of exogenous peptide antigen via MHC class II TAS
Traceable Author Statement
more info
 
antigen processing and presentation of peptide antigen via MHC class I TAS
Traceable Author Statement
more info
 
intracellular protein transport IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
membrane organization IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
positive regulation of protein exit from endoplasmic reticulum IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
regulation of COPII vesicle coating IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
vesicle organization IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
Component Evidence Code Pubs
COPII vesicle coat IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
ER to Golgi transport vesicle membrane TAS
Traceable Author Statement
more info
 
Golgi cisterna membrane IEA
Inferred from Electronic Annotation
more info
 
cytosol TAS
Traceable Author Statement
more info
 
endoplasmic reticulum IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
endoplasmic reticulum exit site IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
endoplasmic reticulum membrane TAS
Traceable Author Statement
more info
 

General protein information

Preferred Names
GTP-binding protein SAR1b
Names
2310075M17Rik
GTP-binding protein B
GTP-binding protein Sara
SAR1 homolog B
SAR1a gene homolog 2

NCBI Reference Sequences (RefSeq)

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.

Genomic

  1. NG_017002.1 RefSeqGene

    Range
    5001..36695
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_001033503.2NP_001028675.1  GTP-binding protein SAR1b

    See identical proteins and their annotated locations for NP_001028675.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) represents the longer transcript. Variants 1 and 2 both encode the same protein.
    Source sequence(s)
    AC106763, BC093034, CD048852
    Consensus CDS
    CCDS4177.1
    UniProtKB/Swiss-Prot
    Q9Y6B6
    Related
    ENSP00000404997.1, ENST00000439578.5
    Conserved Domains (1) summary
    cd00879
    Location:3197
    Sar1; Sar1 is an essential component of COPII vesicle coats
  2. NM_016103.4NP_057187.1  GTP-binding protein SAR1b

    See identical proteins and their annotated locations for NP_057187.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) differs in the 5' UTR compared to variant 1. Variants 1 and 2 both encode the same protein.
    Source sequence(s)
    AC106763, BC093034
    Consensus CDS
    CCDS4177.1
    UniProtKB/Swiss-Prot
    Q9Y6B6
    Related
    ENSP00000385432.2, ENST00000402673.6
    Conserved Domains (1) summary
    cd00879
    Location:3197
    Sar1; Sar1 is an essential component of COPII vesicle coats

RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 109

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p12 Primary Assembly

Genomic

  1. NC_000005.10 Reference GRCh38.p12 Primary Assembly

    Range
    134601149..134632843 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)
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