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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:AAX46970
Protein Name:AAX46970.1 phosphate transporter subunit [Prochlorococcus phage P-SSM4]
Length:322
Molecular Weight:
Species:Prochlorococcus phage P-SSM4 [268747]
Substrate triphosphate(5-)

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MKAFAVALLG LFTITPIAEA STRLSGAGAS FPAKIYTRWF ADLAKEKGAA RVNYQAVGSG 
61:	SGRKAFIDQT VNFGASDDPM KDKDIAKVTR GLVQIPMTGG TIAFGYNNPG CELKLTQQQA 
121:	VEVAMGMIDN WKELGCDDQK LTWAHRSDGS GTTKAFTNSM EAFSPTWTLG TGKSVAWPKG 
181:	VGGKGNAGVA GVIKNTPGAI GYVNQSYIDD TVRAAALQNL NGEFLKPSVE AGAKALNGIE 
241:	LDENLAGKNP NPTAEGAYPI ATLTWILAYE TGNGRNTEAI KSSLSRLLSD EYQDKAPKLG 
301:	FVPLKGDILE KAKSAVDKIG K