Reviewed, UniProtKB/Swiss-Prot Q13367 (AP3B2_HUMAN)

Names and origin

Protein names

Recommended name:
    AP-3 complex subunit beta-2
Alternative name(s):
    Adapter-related protein complex 3 subunit beta-2
    Adaptor protein complex AP-3 beta-2 subunit
    AP-3 complex beta-2 subunit
    Beta3B-adaptin
    Clathrin assembly protein complex 3 beta-2 large chain
    Neuron-specific vesicle coat protein beta-NAP

Gene names

Name:

AP3B2

Organism

Homo sapiens (Human)

Taxonomic identifier

9606 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo

Protein attributes

Sequence length	1082 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Function	Subunit of non-clathrin- and clathrin-associated adaptor protein complex 3 that plays a role in protein sorting in the late-Golgi/trans-Golgi network (TGN) and/or endosomes. The AP complexes mediate both the recruitment of clathrin to membranes and the recognition of sorting signals within the cytosolic tails of transmembrane cargo molecules. AP-3 appears to be involved in the sorting of a subset of transmembrane proteins targeted to lysosomes and lysosome-related organelles.
Subunit structure	Adaptor protein complex 3 (AP-3) is an heterotetramer composed of two large adaptins (delta-type subunit AP3D1 and beta-type subunit AP3B1 or AP3B2), a medium adaptin (mu-type subunit AP3M1 or AP3M2) and a small adaptin (sigma-type subunit APS1 or AP3S2).
Subcellular location	Golgi apparatus. Cytoplasmic vesicle › clathrin-coated vesicle membrane; Peripheral membrane protein; Cytoplasmic sideBy similarity. Golgi apparatusBy similarity. Note= Component of the coat surrounding the cytoplasmic face of coated vesicles located at the Golgi complex By similarity.
Tissue specificity	Expression is specific to nervous system. Expressed in nerve terminal and cell body, and is associated with nerve-terminal vesicles. Expression seen in Purkinje cells, cortical neurons, neuroectodermal tumors and graded in cerebral cortex (deeper layers exhibit stronger expression).
Developmental stage	Expressed from early in development through adulthood.
Sequence similarities	Belongs to the adaptor complexes large subunit family.

Ontologies

Keywords
Biological process	Endocytosis Protein transport Transport
Cellular component	Cytoplasmic vesicle Golgi apparatus Membrane
PTM	Phosphoprotein
Gene Ontology (GO)
Biological process	post-Golgi vesicle-mediated transport Ref.1 Traceable author statement. Source: ProtInc
Cellular component	COPI-coated vesicle Ref.1 Traceable author statement. Source: ProtInc
Molecular function	transporter activity Ref.1 Traceable author statement. Source: ProtInc
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view
Molecule processing
	Chain	1 – 1082	1082	AP-3 complex subunit beta-2
Regions
	Compositional bias	646 – 798	153	Glu/Ser-rich
Amino acid modifications
	Modified residue	272	1	Phosphoserine By similarity
	Modified residue	282	1	Phosphoserine By similarity
Experimental info
	Sequence conflict	332 – 346	15	APKAE…KALVR → GPRRKWRHRQGAGA in AAC50219. Ref.1

Sequences

	Sequence		Length	Mass (Da)
	Q13367-1 [UniParc]. Last modified September 26, 2001. Version 2. Checksum: EE2AC45263F4552E	FASTA	1,082	119,059
	10 20 30 40 50 60 MSAAPAYSED KGGSAGPGEP EYGHDPASGG IFSSDYKRHD DLKEMLDTNK DSLKLEAMKR 70 80 90 100 110 120 IVAMIARGKN ASDLFPAVVK NVACKNIEVK KLVYVYLVRY AEEQQDLALL SISTFQRGLK 130 140 150 160 170 180 DPNQLIRASA LRVLSSIRVP IIVPIMMLAI KEAASDMSPY VRKTAAHAIP KLYSLDSDQK 190 200 210 220 230 240 DQLIEVIEKL LADKTTLVAG SVVMAFEEVC PERIDLIHKN YRKLCNLLID VEEWGQVVII 250 260 270 280 290 300 SMLTRYARTQ FLSPTQNESL LEENAEKAFY GSEEDEAKGA GSEETAAAAA PSRKPYVMDP 310 320 330 340 350 360 DHRLLLRNTK PLLQSRSAAV VMAVAQLYFH LAPKAEVGVI AKALVRLLRS HSEVQYVVLQ 370 380 390 400 410 420 NVATMSIKRR GMFEPYLKSF YIRSTDPTQI KILKLEVLTN LANETNIPTV LREFQTYIRS 430 440 450 460 470 480 MDKDFVAATI QAIGRCATNI GRVRDTCLNG LVQLLSNRDE LVVAESVVVI KKLLQMQPAQ 490 500 510 520 530 540 HGEIIKHLAK LTDNIQVPMA RASILWLIGE YCEHVPRIAP DVLRKMAKSF TAEEDIVKLQ 550 560 570 580 590 600 VINLAAKLYL TNSKQTKLLT QYVLSLAKYD QNYDIRDRAR FTRQLIVPSE QGGALSRHAK 610 620 630 640 650 660 KLFLAPKPAP VLESSFKDRD HFQLGSLSHL LNAKATGYQE LPDWPEEAPD PSVRNVEVPE 670 680 690 700 710 720 WTKCSNREKR KEKEKPFYSD SEGESGPTES ADSDPESESE SDSKSSSESG SGESSSESDN 730 740 750 760 770 780 EDQDEDEEKG RGSESEQSEE DGKRKTKKKV PERKGEASSS DEGSDSSSSS SESEMTSESE 790 800 810 820 830 840 EEQLEPASWS RKTPPSSKSA PATKEISLLD LEDFTPPSVQ PVSPPAIVST SLAADLEGLT 850 860 870 880 890 900 LTDSTLVPSL LSPVSGVGRQ ELLHRVAGEG LAVDYTFSRQ PFSGDPHMVS VHIHFSNSSD 910 920 930 940 950 960 TPIKGLHVGT PKLPAGISIQ EFPEIESLAP GESATAVMGI NFCDSTQAAN FQLCTQTRQF 970 980 990 1000 1010 1020 YVSIQPPVGE LMAPVFMSEN EFKKEQGKLM GMNEITEKLM LPDTCRSDHI VVQKVTATAN 1030 1040 1050 1060 1070 1080 LGRVPCGTSD EYRFAGRTLT GGSLVLLTLD ARPAGAAQLT VNSEKMVIGT MLVKDVIQAL TQ

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Beta-NAP, a cerebellar degeneration antigen, is a neuron-specific vesicle coat protein." Newman L.S., McKeever M.O., Okano H.J., Darnell R.B. Cell 82:773-783(1995) [PubMed: 7671305] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA]. Tissue: Cerebellum and Hippocampus.
[2]	"Correction of beta3B." Peden A.A., Robinson M.S. Submitted (AUG-1997) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA].
[3]	"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Tissue: Colon.
[4]	"Antiserum from a patient with cerebellar degeneration identifies a novel protein in Purkinje cells, cortical neurons, and neuroectodermal tumors." Darnell R.B., Furneaux H.M., Posner J.B. J. Neurosci. 11:1224-1230(1991) [PubMed: 1851215] [Abstract] Cited for: TISSUE SPECIFICITY.

Cross-references

Sequence databases
EMBLGenBankDDBJ	U37673 mRNA. Translation: AAC50219.1. AF022152 mRNA. Translation: AAB71894.1. BC093739 mRNA. Translation: AAH93739.1.
PIR	T50650.
RefSeq	NP_004635.2.
UniGene	Hs.199593
3D structure databases
HSSP	HSSP built from PDB template 1GW5 based on UniProtKB P21851.
ModBase	Search...
Protein-protein interaction databases
IntAct	Q13367.
PTM databases
PhosphoSite	Q13367.
Genome annotation databases
Ensembl	ENSG00000103723. Homo sapiens. [Contig view]
GeneID	8120.
KEGG	hsa:8120.
Organism-specific databases
H-InvDB	HIX0012509.
HGNC	HGNC:567. AP3B2.
MIM	602166. gene.
PharmGKB	PA24858.
GenAtlas	Search...
GeneCards	Search...
GeneLynx	Search...
Phylogenomic databases
HOVERGEN	Q13367.
Gene expression databases
ArrayExpress	Q13367.
CleanEx	HS_AP3B2.
GermOnline	ENSG00000103723. Homo sapiens.
Family and domain databases
InterPro	IPR017108. AP3_complex_bsu. IPR011989. ARM-like. IPR002553. Clathrin/coatomer_adapt-like_N. [Graphical view]
Gene3D	G3DSA:1.25.10.10. ARM-like. 1 hit.
Pfam	PF01602. Adaptin_N. 1 hit. [Graphical view]
PIRSF	PIRSF037096. AP3_complex_beta. 1 hit.
ProDom	Q13367. [Graphical view] [Entries sharing at least one domain]
BLOCKS	Search...
Other Resources
SOURCE	Search...
ProtoNet	Search...

Entry information

Entry name

AP3B2_HUMAN

Accession

Primary (citable) accession number: Q13367
Secondary accession number(s): O14808, Q52LY8

Entry history

Integrated into UniProtKB/Swiss-Prot:	September 26, 2001
Last sequence update:	September 26, 2001
Last modified:	July 22, 2008
This is version 60 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)