SMTL ID : 8v01.1

The structure of the native cardiac thin filament troponin core in Ca2+-bound fully activated state 1 from the lower strand

Coordinates

PDB Format Compare

Method

ELECTRON MICROSCOPY

Oligo State

hetero-2-1-1-1-2-mer

Ligands

2 x ADP: ADENOSINE-5'-DIPHOSPHATE(Non-covalent)

ADP.1: 16 residues within 4Å: Chain A: G.15, S.16, L.18, K.20, G.158, D.159, R.212, K.215, E.216, G.303, G.304, T.305, M.307, Y.308, K.338 Ligands: MG.2 7 PLIP interactions: 7 interactions with chain A Hydrogen bonds: A:S.16, A:D.159, A:D.159, A:K.215, A:G.304 Salt bridges: A:K.20, A:K.20 ADP.3: 16 residues within 4Å: Chain B: G.15, S.16, L.18, K.20, G.158, D.159, R.212, K.215, E.216, G.303, G.304, T.305, M.307, Y.308, K.338 Ligands: MG.4 7 PLIP interactions: 7 interactions with chain B Hydrogen bonds: B:S.16, B:D.159, B:D.159, B:K.215, B:G.304 Salt bridges: B:K.20, B:K.20

2 x MG: MAGNESIUM ION(Non-covalent)

MG.2: 3 residues within 4Å: Chain A: Q.139, D.156 Ligands: ADP.1 No protein-ligand interaction detected (PLIP) MG.4: 3 residues within 4Å: Chain B: Q.139, D.156 Ligands: ADP.3 No protein-ligand interaction detected (PLIP)

3 x CA: CALCIUM ION(Non-covalent)

CA.5: 5 residues within 4Å: Chain C: D.65, D.67, S.69, T.71, E.76 3 PLIP interactions: 3 interactions with chain C Metal complexes: C:D.67, C:D.67, C:T.71 CA.6: 6 residues within 4Å: Chain C: D.141, N.143, D.145, R.147, D.149, E.152 4 PLIP interactions: 4 interactions with chain C Metal complexes: C:D.141, C:D.145, C:R.147, C:E.152 CA.7: 6 residues within 4Å: Chain C: D.105, N.107, D.109, Y.111, D.113, E.116 3 PLIP interactions: 3 interactions with chain C Metal complexes: C:D.109, C:E.116, C:E.116

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Risi, C.M. et al., Troponin Structural Dynamics in the Native Cardiac Thin Filament Revealed by Cryo Electron Microscopy. J.Mol.Biol. (2024)

Release Date

2024-03-06

Peptides

Actin, alpha cardiac muscle 1: AB
Troponin C, slow skeletal and cardiac muscles: C
Troponin I, cardiac muscle: D
Troponin T2, cardiac type: E
Tropomyosin alpha-1 chain: FG

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

E
E

F
F

G
G

Actin, alpha cardiac muscle 1

Troponin C, slow skeletal and cardiac muscles

Troponin I, cardiac muscle

Troponin T2, cardiac type

Tropomyosin alpha-1 chain

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