SMTL ID : 7agv.3 (3 other biounits)

High-resolution structure of the K+/H+ antiporter subunit KhtT in complex with c-di-AMP

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 1.85 Å

Oligo State

homo-dimer

Ligands

1 x 2BA: (2R,3R,3aS,5R,7aR,9R,10R,10aS,12R,14aR)-2,9-bis(6-amino-9H-purin-9-yl)octahydro-2H,7H-difuro[3,2-d:3',2'-j][1,3,7,9,2,8 ]tetraoxadiphosphacyclododecine-3,5,10,12-tetrol 5,12-dioxide(Non-covalent)

2BA.1: 24 residues within 4Å: Chain A: L.107, G.108, D.111, V.112, R.113, Q.114, V.118, T.119, V.120, P.134, G.135, A.136 Chain B: L.107, G.108, D.111, V.112, R.113, Q.114, V.118, T.119, V.120, P.134, G.135, A.136 19 PLIP interactions: 11 interactions with chain B, 8 interactions with chain A Hydrogen bonds: B:V.112, B:R.113, B:Q.114, B:Q.114, B:V.120, B:V.120, A:R.113, A:R.113, A:Q.114, A:V.120, A:V.120 Water bridges: B:A.136, B:A.136 Salt bridges: B:R.113, A:R.113 pi-Cation interactions: B:R.113, B:R.113, A:R.113, A:R.113

3 x ACT: ACETATE ION(Non-functional Binders)

ACT.2: 5 residues within 4Å: Chain A: I.40, R.42 Chain B: I.40, R.42, S.53 2 PLIP interactions: 2 interactions with chain B Hydrophobic interactions: B:I.40 Hydrogen bonds: B:S.53 ACT.3: 9 residues within 4Å: Chain A: R.38, D.59, R.63 Chain B: G.70, G.71, P.76, L.79, I.82, W.93 4 PLIP interactions: 2 interactions with chain A, 2 interactions with chain B Salt bridges: A:R.38, A:R.63 Hydrophobic interactions: B:I.82, B:W.93 ACT.4: 9 residues within 4Å: Chain A: G.70, G.71, P.76, L.79, I.82, W.93 Chain B: R.38, D.59, R.63 3 PLIP interactions: 1 interactions with chain A, 2 interactions with chain B Hydrophobic interactions: A:W.93 Salt bridges: B:R.38, B:R.63

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Cereija, T.B. et al., c-di-AMP, a likely master regulator of bacterial K + homeostasis machinery, activates a K + exporter. Proc.Natl.Acad.Sci.USA (2021)

Release Date

2021-03-31

Peptides

K(+)/H(+) antiporter subunit KhtT: AB

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
E

B
F

K(+)/H(+) antiporter subunit KhtT

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