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3.A.2.2.5
H -translocating V-type ATPase (Dettmer et al., 2006). The mung bean (Phaseolus aureus) subunits a and c (c' and c") alone catalyzes passive channel-mediated proton flux, but the a,c,d complex does not (Ouyang et al., 2008).  A 4 TMS c-subunit of Tamarix hispida (onion), almost identical to the c-subunit of the A. thaliana homologue, plays a stress tolerance role in response to salt, drought, UV, oxidation, heat, cold, and heavy metals (Gao et al. 2011). The VHA-H subunit is up-regluated upon high salt stress conditions (Yang et al. 2018). The VHAc`1 protein seems to play an important role in plant stress tolerance (Wang et al. 2020).

Accession Number:Q9LX65
Protein Name:V-type proton ATPase subunit H
Length:441
Molecular Weight:50284.00
Species:Arabidopsis thaliana (Mouse-ear cress) [3702]
Location1 / Topology2 / Orientation3: Vacuole membrane1 / Peripheral membrane protein2
Substrate hydron

Cross database links:

Entrez Gene ID: 823170   
Pfam: PF03224    PF11698   
KEGG: ath:AT3G42050   

Gene Ontology

GO:0009507 C:chloroplast
GO:0000325 C:plant-type vacuole
GO:0005886 C:plasma membrane
GO:0000221 C:vacuolar proton-transporting V-type ATPase, V1 domain
GO:0005488 F:binding
GO:0046961 F:proton-transporting ATPase activity, rotational mechanism
GO:0015986 P:ATP synthesis coupled proton transport

References (3)

[1] “Sequence and analysis of chromosome 3 of the plant Arabidopsis thaliana.”  Salanoubat M.et.al.   11130713
[2] “Empirical analysis of transcriptional activity in the Arabidopsis genome.”  Yamada K.et.al.   14593172
[3] “A simple nomenclature for a complex proton pump: VHA genes encode the vacuolar H(+)-ATPase.”  Sze H.et.al.   11950611

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MDQAELSIEQ VLKRDIPWET YMNTKLVSAK GLQLLRRYDK KPESARAQLL DEDGPAYVHL 
61:	FVSILRDIFK EETVEYVLAL IYEMLSANPT RARLFHDESL ANEDTYEPFL RLLWKGNWFI 
121:	QEKSCKILAW IISARPKAGN AVIGNGIDDV LKGLVEWLCA QLKQPSHPTR GVPIAISCLS 
181:	SLLKEPVVRS SFVQADGVKL LVPLISPAST QQSIQLLYET CLCIWLLSYY EPAIEYLATS 
241:	RTMQRLTEVV KHSTKEKVVR VVILTFRNLL PKGTFGAQMV DLGLPHIIHS LKTQAWSDED 
301:	LLDALNQLEE GLKDKIKKLS SFDKYKQEVL LGHLDWNPMH KETNFWRENV TCFEENDFQI 
361:	LRVLLTILDT SSDPRSLAVA CFDISQFIQY HAAGRVIVAD LKAKERVMKL INHENAEVTK 
421:	NAILCIQRLL LGAKYASFLQ A