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3.A.1.11.10
The 3-component polyamine uptake transporter, PotABD. Transports homospermidine and possibly other polyamines. Inactivation of the potADB gene cluster (potADB) disrupted diazotrophic growth, clearly suggesting the importance of polyamine homeostasis in Anabaena. (Burnat et al. 2018). 

Accession Number:Q3MAR5
Protein Name:Spermidine/putrescine import ATP-binding protein PotA
Length:381
Molecular Weight:42676.00
Species:Anabaena variabilis (strain ATCC 29413 / PCC 7937) [240292]
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Peripheral membrane protein2
Substrate

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FASTA formatted sequence
1:	MNMAQTVTQN PRGVKTLLPL DVELRNVFKF FNQEPAVHGV DLDVKQGEFF SILGPSGCGK 
61:	TTTLRLIAGF EQVDAGKLLI QGQPMTNIPP YRRPVNTVFQ SYALFNHLNV WDNVAFGLRL 
121:	KKSRKSEVES RVKEALKLVK MESLRSRFPS QLSGGQQQRV ALARALVNRP AVVLLDEPLG 
181:	ALDLKLRKEM QVELSNLHKN LGLTFIMVTH DQEEALSLSD RIAVMNQGKI EQIGTPQEIY 
241:	ERPKTSFVAD FIGDTNLFSG EITVLEAEYI QIVTKTGLTI VVARNEDTPA ELLKSVVVSV 
301:	RPEKIQLSLY PPSSLNNCFE GRLINVMYLG THVNYLVQLI NGININVLQP NTFGNLPDRE 
361:	TPIYAWWAES DCLAINQMTN D