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3.A.1.7.6
High affinity phosphate-specific transporter, PstABCS, where PstA (AAZ57802) = 304 aas with 6 TMSs, PstB (AAZ57801) = 267 aas with 0 TMSs (the ATPase), PstC (AAZ57803) = 317 aas with 6 TMSs, PstS (Q46L27 or AAX46970) = 321 aas and 1 N-terminal TMS; this PstS homolog is encoded by Prochlorococcus phage P-SSM3 (Zhao et al. 2022).

Accession Number:AAZ57802
Protein Name:AAZ57802.1 phosphate ABC transporter membrane protein 2, PhoT family [Prochlorococcus marinus str. NATL2A]
Length:305
Molecular Weight:
Species:Prochlorococcus marinus str. NATL2A [59920]
Number of TMSs:6
Substrate triphosphate(5-)

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MKYTSKKSLT YNPSLTRNIG NKALTIASAL FAIISVLPLI LVISYVLIKG GSYINLDTLI 
61:	LEPEPPGDDL LSAGGIGPAI TGTFIMSVIA SIISIPVGVG GGIYLAEYSK SGKFAKFIRF 
121:	GSNVLAGVPS IIAGVFIYAI IVSTKILFGS MFSGIAGGIS LSILMVPTII KTTDEALKLV 
181:	PNDMRRAAFG VGASKFTMIT NITLPAAFSS ISTGVLLALA RAAGETAPLI FTALFSRYYI 
241:	TSFDDLFYEM GSLSVLIYNF ALEPYEAQNQ LAWAASFILV VVLLSLNILS RWIGTLGAFS 
301:	KNKV