Calcium in PDB 6i7s: Microsomal Triglyceride Transfer Protein

All present enzymatic activity of Microsomal Triglyceride Transfer Protein:
5.3.4.1;

The structure of Microsomal Triglyceride Transfer Protein, PDB code: 6i7s was solved by E.Biterova, M.N.Isupov, R.M.Keegan, A.A.Lebedev, L.W.Ruddock, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	49.35 / 2.50
Space group	P 1
Cell size a, b, c (Å), α, β, γ (°)	77.537, 105.595, 112.269, 89.81, 76.95, 74.24
R / Rfree (%)	20.5 / 25.7

The binding sites of Calcium atom in the Microsomal Triglyceride Transfer Protein (pdb code 6i7s). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 2 binding sites of Calcium where determined in the Microsomal Triglyceride Transfer Protein, PDB code: 6i7s:
Jump to Calcium binding site number: 1; 2;

Calcium binding site 1 out of 2 in the Microsomal Triglyceride Transfer Protein


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Microsomal Triglyceride Transfer Protein within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca601 b:57.4 occ:1.00 O A:LYS386 2.5 55.2 1.0 O A:PRO447 2.6 61.1 1.0 O A:ASP383 2.6 61.9 1.0 O A:PHE446 2.6 55.4 1.0 O A:ALA381 2.8 54.5 1.0 O A:HOH713 3.1 72.4 1.0 C A:PRO447 3.4 60.8 1.0 C A:PHE446 3.5 60.0 1.0 C A:LYS386 3.7 48.7 1.0 C A:ASP383 3.7 55.5 1.0 C A:ALA381 3.9 53.5 1.0 CB A:PHE446 4.0 53.5 1.0 CG2 A:VAL388 4.1 54.4 1.0 N A:ALA448 4.1 73.6 1.0 N A:ASP383 4.1 60.8 1.0 N A:PRO447 4.1 67.4 1.0 C A:PHE382 4.2 55.0 1.0 CA A:ALA448 4.3 71.5 1.0 CA A:PRO447 4.3 64.2 1.0 CA A:PHE382 4.3 55.1 1.0 CA A:PHE446 4.4 53.6 1.0 N A:VAL388 4.4 53.9 1.0 CA A:ASP383 4.5 57.6 1.0 N A:ASN387 4.6 49.1 1.0 N A:PHE382 4.6 56.8 1.0 CA A:LYS386 4.6 54.8 1.0 N A:LYS386 4.7 60.6 1.0 CA A:ASN387 4.7 46.8 1.0 N A:GLU384 4.7 62.0 1.0 CB A:VAL388 4.8 50.4 1.0 O A:PHE382 4.8 59.3 1.0 N A:SER449 4.9 75.2 1.0 O A:VAL380 4.9 46.5 1.0 CA A:ALA381 5.0 53.4 1.0 CA A:GLU384 5.0 67.8 1.0

Calcium binding site 2 out of 2 in the Microsomal Triglyceride Transfer Protein


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Microsomal Triglyceride Transfer Protein within 5.0Å range: probe atom residue distance (Å) B Occ B:Ca601 b:60.2 occ:1.00 O B:LYS386 2.5 51.4 1.0 O B:ASP383 2.6 66.3 1.0 O B:PRO447 2.6 62.4 1.0 O B:PHE446 2.7 55.7 1.0 O B:ALA381 2.8 44.5 1.0 O B:HOH719 3.4 45.2 1.0 C B:PRO447 3.4 60.0 1.0 C B:PHE446 3.6 55.2 1.0 C B:ASP383 3.7 56.7 1.0 C B:LYS386 3.8 47.4 1.0 C B:ALA381 3.9 42.9 1.0 N B:ASP383 4.0 55.2 1.0 N B:ALA448 4.1 62.1 1.0 CG2 B:VAL388 4.1 44.6 1.0 CB B:PHE446 4.1 52.3 1.0 C B:PHE382 4.1 52.4 1.0 N B:PRO447 4.2 58.6 1.0 CA B:ALA448 4.2 61.2 1.0 CA B:PHE382 4.3 48.0 1.0 CA B:PRO447 4.3 59.5 1.0 CA B:ASP383 4.4 54.0 1.0 CA B:PHE446 4.5 53.4 1.0 N B:VAL388 4.5 46.7 1.0 N B:PHE382 4.6 42.8 1.0 N B:GLU384 4.7 56.1 1.0 N B:ASN387 4.7 44.9 1.0 CA B:LYS386 4.7 53.1 1.0 N B:LYS386 4.7 54.7 1.0 O B:PHE382 4.7 49.7 1.0 N B:SER449 4.8 63.7 1.0 CA B:ASN387 4.8 46.6 1.0 CB B:VAL388 4.9 50.4 1.0 O B:VAL380 4.9 40.2 1.0 CA B:GLU384 5.0 58.8 1.0

E.I.Biterova, M.N.Isupov, R.M.Keegan, A.A.Lebedev, A.A.Sohail, I.Liaqat, H.I.Alanen, L.W.Ruddock. The Crystal Structure of Human Microsomal Triglyceride Transfer Protein. Proc.Natl.Acad.Sci.Usa V. 116 17251 2019.
ISSN: ESSN 1091-6490
PubMed: 31395737
DOI: 10.1073/PNAS.1903029116