Phosphate-binding protein

spinqualitylabelsall models E. coli phosphate-binding protein complex with phosphate 1pbp Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Function Phosphate-binding protein (PBP) binds phosphate (Pi) with high affinity. PBP is involved in various biological processes like cell cycle regulation. PBP is produced under conditions of low Pi concentration. It binds Pi in the periplasm and transfers it to a membrane protein which transports it to the cytoplasm. PBP undergoes conformational change upon binding to Pi. Structural highlights The PBP phosphate-binding site is highly selective. It can bind monobasic and dibasic phosphate but does not bind sulfate.

3D structures of phosphate-binding protein

phosphate-binding protein 3D structures

Updated on 30-April-2026

2v3q – hPBP + Pi – human
1qui, 1oib - EcPBP (mutant) - Escherichia coli
1pbp, 2abh, 1ixh – EcPBP + Pi
1qui - EcPBP (mutant) + Br + Pi
1quj, 1qul - EcPBP (mutant) + Cl + Pi
1quk, 1ixi, 1ixg, 1a40 - EcPBP (mutant) + Pi
1a54, 1a55 - EcPBP (mutant) + dihydrogenphosphate
1pc3, 4lvq – PBP + Pi – Mycobacterium tuberculosis
3w9v, 3w9w – upPBP + Pi – unidentified prokaryote
4m1v - upPBP (mutant) + Pi
4exl, 4h1x – SpPBP – Streptococcus pneumoniae
4lat – SpPBP + Pi
4omb, 4pqj – PBP + Pi – Pseudomonas aeruginosa
5wnn – PBP + Pi – Brucella melitensis
5ub3 – XcPBP – Xanthomonas citri
5i84, 5ub4 – XcPBP + Pi
5ub6 – XcPBP + PPi
5ub7 – XcPBP + ATP
5j1d – PBP + Pi – Stenotrophomonas maltophilia
4jwo – PBP – Planctomyces limnophilus

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