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2.C.1.1.2
HasB (a distant TonB homologue that is specific for HasR (1.B.14.5.1)) (Benevides-Matos et al., 2008).  Studies revealed a previously unidentified network of HasR-HasB protein-protein interactions in the periplasm (Somboon et al. 2024).

Accession Number:Q79AD1
Protein Name:HasB
Length:263
Molecular Weight:28381.00
Species:Serratia marcescens [615]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Secreted1
Substrate

Cross database links:

Pfam: PF03544   

Gene Ontology

GO:0016020 C:membrane
GO:0030288 C:outer membrane-bounded periplasmic space
GO:0008565 F:protein transporter activity
GO:0015031 P:protein transport

References (1)

[1] “Iron acquisition from heme and hemoglobin by a Serratia marcescens extracellular protein.”  Letoffe S.et.al.   7937909
Structure:
2M2K     

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MSVSPLPFAA PGAAMPWRRC LVLVLALHLL VAALLWPRRD KAEPPWVPPP AVMVLMAAAP 
61:	QAPAEAKQPP GQRTPPPQAE PSAPPEPLPL VKAPDATQPN IAVPPKQKKP PKPVKKNNLP 
121:	RTPPQERIIA PPKVQEQSVG APPPGRADKT AAPQTRLTPY AQAGEDNWRS RISGRLNRFK 
181:	RYPKDALRLK RQGVGQVRFT LDRQGHVLAV TLVSSAGLPS LDREIQALVK RASPLPTPPA 
241:	DAYVNGTVEL TLPIDFSLRG AGF