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3.A.1.15.8
Manganese (Mn2+), zinc (Zn2+) and possibly iron (Fe2+) uptake porter, TroABCD (Hazlett et al., 2003).  Transcription of the operon is controlled by the Mn2+-activated (not Zn2+- or Fe2+-activated) repressor, TroR (153 aas, acc# F7IW50;) TroR contains a metal-binding domain homologous to the YtgC-R protein (3.A.1.15.12) which has the membrane domain of this ABC transporter (N-terminus) fused to the repressor domain (C-terminus) (Liu et al. 2013).  TroA (Tromp1), the periplasmic metal binding protein, was originally reported to be an outer membrane porin (Zhang et al. 1999), but this proved to be incorrect.

Accession Number:P96119
Protein Name:TroD
Length:367
Molecular Weight:38764.00
Species:Treponema pallidum [160]
Number of TMSs:9
Location1 / Topology2 / Orientation3: Cell membrane1 / Multi-pass membrane protein2
Substrate iron(2+), zinc(2+), manganese(2+)

Cross database links:

RefSeq: NP_218605.1   
Entrez Gene ID: 2611135   
Pfam: PF00950   
BioCyc: TPAL243276:TP_0166-MONOMER   
KEGG: tpa:TP0166   

Gene Ontology

GO:0016021 C:integral to membrane
GO:0005886 C:plasma membrane
GO:0005524 F:ATP binding
GO:0042626 F:ATPase activity, coupled to transmembrane m...
GO:0006829 P:zinc ion transport

References (2)

[1] “Identification and transcriptional analysis of a Treponema pallidum operon encoding a putative ABC transport system, an iron-activated repressor protein homolog, and a glycolytic pathway enzyme homolog.”  Hardham J.M.et.al.   9332349
[2] “Complete genome sequence of Treponema pallidum, the syphilis spirochete.”  Fraser C.M.et.al.   9665876

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MTMEVVLIAV VVSVACALCG VFLVLRRISL MSDAISHSVI LGIVLGYFLS RTLSSFVPFV 
61:	GAVIAGICSV ICAELLQKTG MVKSDAAVGL VFPAMFGLGV ILVSLYAGNV HLDTDAVLLG 
121:	EIGLAPLDRV SFFAWSLPRS LVQMGSVLCG LLLLLALFFK ELKISTFDPV LATSLGFSPT 
181:	LINYGLMLAV SITCVGAFDS VGAVLVIALM ITPPAAALLL TDNLLLMLVL ASLLASCASI 
241:	SGLFLAVKID GSIAGAMATM AGVLFALVYL FSPKHGVVRR CLVMRALKLD LDVVTLAVHL 
301:	ATHRYTVERS VECAEVHLTE HVSWSARRAA RVVRTALRRG MVERHGALLL LTAQGVSLAQ 
361:	ARLDVSV