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Structure of the native cardiac thin filament at PCA=5.8 having upper tn in CA2+ free state and lower tn in CA2+ bound state

Analyse Structure of the native cardiac thin filament at PCA=5.8 having upper tn in… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB: 7KO7
Type: protein
Length: 7,717 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…
Pockets: 20 · best druggability 0.85

Structure

electron microscopy · 8 distinct chains · 70% helix, 5% strand (DSSP).

Chain	Molecule	Type	Residues	Secondary structure	UniProt
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	Actin, alpha skeletal muscle	protein	375	41% helix, 18% strand	—
P, Q, W, X	Tropomyosin alpha-1 chain	protein	274	98% helix, 0% strand	—
R, S, Y, Z	Tropomyosin alpha-1 chain	protein	29	90% helix, 0% strand	—
T	Troponin T, cardiac muscle	protein	126	85% helix, 0% strand	—
U	Troponin I, cardiac muscle	protein	170	68% helix, 0% strand	—
V, c	Troponin C	protein	160	54% helix, 4% strand	—
a	Troponin T, cardiac muscle	protein	138	89% helix, 0% strand	—
b	Troponin I, cardiac muscle	protein	126	74% helix, 0% strand	—

Pockets

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

Pocket	Volume (Å³)	Druggability	Buriedness	Lining residues	Inside
1	1098	0.85	0.86	124	empty
2	1123	0.85	0.86	123	empty
3	991	0.85	0.86	105	empty
4	878	0.83	0.86	102	empty
5	811	0.81	0.84	84	empty

Interfaces

89 interfaces between chains.

P–Q · 6921 Å² buried · 42 hydrogen bonds · protein-protein
W–X · 6916 Å² buried · 26 hydrogen bonds · protein-protein
T–U · 2250 Å² buried · 35 hydrogen bonds · protein-protein
a–b · 2232 Å² buried · 40 hydrogen bonds · protein-protein
b–c · 1988 Å² buried · 45 hydrogen bonds · protein-protein

Compared structures

7KO7 · Structure of the native cardiac thin filament at pCa=5.8 having upper Tn in Ca2+ free… · the same entry in another collection · chain A against A, TM-score 1.00

Analyse

Open in the research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides and crosslinks on the 3D structure
Elsewhere: RCSB PDB 7KO7 · PDBe 7KO7

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