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Structure of human cardiac thin filament in the calcium free state

Analyse Structure of human cardiac thin filament in the calcium free state in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6KN7
Type
protein
Length
7,781 residues
Chains
29
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Actin, alpha skeletal muscle; Tropomyosin alpha-1 chain; Troponin T, cardiac muscle…
UniProt
P68135, P09493, P45379, P19429, P63316
Ligands
ADP
Pockets
20 · best druggability 0.85

Structure

electron microscopy · 6 distinct chains · 68% helix, 6% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, B, C, D, E, F, G, H, I, J, K, L, M, N, OActin, alpha skeletal muscleprotein37541% helix, 18% strandP68135
P, Q, W, XTropomyosin alpha-1 chainprotein27498% helix, 0% strandP09493
R, S, Y, ZTropomyosin alpha-1 chainprotein3184% helix, 0% strandP09493
T, aTroponin T, cardiac muscleprotein13887% helix, 0% strandP45379
U, bTroponin I, cardiac muscleprotein17072% helix, 0% strandP19429
V, cTroponin C, slow skeletal and cardiac musclesprotein16053% helix, 4% strandP63316

Ligands and binding sites

  • ADP · Adenosine-5'-diphosphate · ligand · 15 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
110820.850.86115ADP
211080.850.86125ADP
310630.850.86114ADP
49730.840.85107ADP
511850.830.84105ADP

Interfaces

90 interfaces between chains.

  • W–X · 6902 Ų buried · 26 hydrogen bonds · protein-protein
  • P–Q · 6900 Ų buried · 27 hydrogen bonds · protein-protein
  • T–U · 2524 Ų buried · 23 hydrogen bonds · protein-protein
  • a–b · 2489 Ų buried · 19 hydrogen bonds · protein-protein
  • U–V · 1433 Ų buried · 14 hydrogen bonds · protein-protein

Compared structures

  • 6KN7 · Structure of human cardiac thin filament in the calcium free state · the same entry in another collection · chain J against J, TM-score 1.00

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