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9.A.17.1.2
The Pex3/Pex16/Pex19 peroxisomal protein importer is for insertion of integral membranes into the peroxisomal and ER membranes. Monotopic hairpin proteins are inserted into ER membranes. These either remain in the ER as resident ER membrane proteins, or are pinched off from the ER as components of new lipid droplets (Zimmermann et al. 2021).

Accession Number:P40855
Protein Name:Pex19 aka Peroxin-19
Length:299
Molecular Weight:32807.00
Species:Homo sapiens (Human) [9606]
Location1 / Topology2 / Orientation3: Cytoplasm1 / Lipid-anchor2 / Cytoplasmic side3
Substrate

Cross database links:

DIP: DIP-24172N
RefSeq: NP_001124511.1    NP_002848.1   
Entrez Gene ID: 5824   
Pfam: PF04614   
OMIM: 214100  phenotype
600279  gene+phenotype
601539  phenotype
KEGG: hsa:5824   

Gene Ontology

GO:0031526 C:brush border membrane
GO:0016021 C:integral to membrane
GO:0005634 C:nucleus
GO:0005778 C:peroxisomal membrane
GO:0005515 F:protein binding
GO:0047485 F:protein N-terminus binding
GO:0016557 P:peroxisome membrane biogenesis
GO:0007031 P:peroxisome organization
GO:0006625 P:protein targeting to peroxisome

References (17)

[1] “Sequence of a putative human housekeeping gene (HK33) localized on chromosome 1.”  Braun A.et.al.   8076834
[2] “Genomic organization and molecular characterization of a gene encoding HsPXF, a human peroxisomal farnesylated protein.”  Kammerer S.et.al.   9339377
[3] “Human PEX19: cDNA cloning by functional complementation, mutation analysis in a patient with Zellweger syndrome, and potential role in peroxisomal membrane assembly.”  Matsuzono Y.et.al.   10051604
[4] “The DNA sequence and biological annotation of human chromosome 1.”  Gregory S.G.et.al.   16710414
[5] “The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).”  The MGC Project Teamet.al.   15489334
[6] “Human adrenoleukodystrophy protein and related peroxisomal ABC transporters interact with the peroxisomal assembly protein PEX19p.”  Gloeckner C.J.et.al.   10777694
[7] “PEX19 binds multiple peroxisomal membrane proteins, is predominantly cytoplasmic, and is required for peroxisome membrane synthesis.”  Sacksteder K.A.et.al.   10704444
[8] “Pex19p dampens the p19ARF-p53-p21WAF1 tumor suppressor pathway.”  Sugihara T.et.al.   11259404
[9] “Human pex19p binds peroxisomal integral membrane proteins at regions distinct from their sorting sequences.”  Fransen M.et.al.   11390669
[10] “Two splice variants of human PEX19 exhibit distinct functions in peroxisomal assembly.”  Mayerhofer P.U.et.al.   11883941
[11] “PEX3 functions as a PEX19 docking factor in the import of class I peroxisomal membrane proteins.”  Fang Y.et.al.   15007061
[12] “PEX19 is a predominantly cytosolic chaperone and import receptor for class 1 peroxisomal membrane proteins.”  Jones J.M.et.al.   14709540
[13] “Global proteomic profiling of phosphopeptides using electron transfer dissociation tandem mass spectrometry.”  Molina H.et.al.   17287340
[14] “A quantitative atlas of mitotic phosphorylation.”  Dephoure N.et.al.   18669648
[15] “Lys-N and trypsin cover complementary parts of the phosphoproteome in a refined SCX-based approach.”  Gauci S.et.al.   19413330
[16] “Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions.”  Mayya V.et.al.   19690332
[17] “Structural basis for competitive interactions of Pex14 with the import receptors Pex5 and Pex19.”  Neufeld C.et.al.   19197237
Structure:
2W85   2WL8   3AJB   3MK4   5LNF     

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MAAAEEGCSV GAEADRELEE LLESALDDFD KAKPSPAPPS TTTAPDASGP QKRSPGDTAK 
61:	DALFASQEKF FQELFDSELA SQATAEFEKA MKELAEEEPH LVEQFQKLSE AAGRVGSDMT 
121:	SQQEFTSCLK ETLSGLAKNA TDLQNSSMSE EELTKAMEGL GMDEGDGEGN ILPIMQSIMQ 
181:	NLLSKDVLYP SLKEITEKYP EWLQSHRESL PPEQFEKYQE QHSVMCKICE QFEAETPTDS 
241:	ETTQKARFEM VLDLMQQLQD LGHPPKELAG EMPPGLNFDL DALNLSGPPG ASGEQCLIM