Calcium in PDB 9i6c: STMPR1, Stenotrophomonas Maltophilia Protease 1, 36 kDa Alkine Serine Protease in Complex with Leupeptin

The structure of STMPR1, Stenotrophomonas Maltophilia Protease 1, 36 kDa Alkine Serine Protease in Complex with Leupeptin, PDB code: 9i6c was solved by M.Sommer, L.Outzen, A.Negm, S.Windhorst, W.Weber, C.Betzel, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	29.64 / 2.08
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	60.78, 86.41, 132.35, 90, 90, 90
R / Rfree (%)	16.8 / 21.8

The binding sites of Calcium atom in the STMPR1, Stenotrophomonas Maltophilia Protease 1, 36 kDa Alkine Serine Protease in Complex with Leupeptin (pdb code 9i6c). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total only one binding site of Calcium was determined in the STMPR1, Stenotrophomonas Maltophilia Protease 1, 36 kDa Alkine Serine Protease in Complex with Leupeptin, PDB code: 9i6c:

Calcium binding site 1 out of 1 in the STMPR1, Stenotrophomonas Maltophilia Protease 1, 36 kDa Alkine Serine Protease in Complex with Leupeptin


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of STMPR1, Stenotrophomonas Maltophilia Protease 1, 36 kDa Alkine Serine Protease in Complex with Leupeptin within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca401 b:11.0 occ:1.00 OD2 A:ASP5 2.3 13.8 1.0 O A:VAL121 2.3 14.2 1.0 O A:GLN116 2.3 11.9 1.0 O A:MET123 2.4 11.0 1.0 OD1 A:ASN119 2.5 11.9 1.0 OD2 A:ASP51 2.5 10.2 1.0 OD1 A:ASP51 2.5 12.6 1.0 CG A:ASP51 2.8 12.3 1.0 C A:GLN116 3.5 13.7 1.0 CG A:ASP5 3.5 13.8 1.0 CG A:ASN119 3.5 13.1 1.0 C A:VAL121 3.5 13.1 1.0 C A:MET123 3.5 12.6 1.0 N A:MET123 3.7 14.2 1.0 ND2 A:ASN119 3.9 11.9 1.0 CB A:ASP5 4.1 13.8 1.0 C A:GLY122 4.2 13.6 1.0 N A:THR117 4.2 12.4 1.0 CA A:THR117 4.3 12.5 1.0 CA A:MET123 4.3 13.3 1.0 CA A:VAL121 4.3 14.1 1.0 N A:VAL121 4.4 14.2 1.0 CB A:ASP51 4.4 12.2 1.0 N A:GLY122 4.5 16.2 1.0 CA A:GLY122 4.5 12.8 1.0 OD1 A:ASP5 4.5 11.6 1.0 CG A:GLU115 4.5 11.0 1.0 CB A:VAL121 4.5 12.5 1.0 CA A:GLN116 4.5 13.5 1.0 N A:ALA124 4.5 13.4 1.0 OE2 A:GLU115 4.6 9.5 1.0 CB A:GLN116 4.7 16.7 1.0 CA A:ALA124 4.8 11.9 1.0 CB A:ASN119 4.8 12.0 1.0 N A:GLN116 4.9 12.8 1.0 N A:ASN119 4.9 15.2 1.0 O A:GLY122 4.9 12.6 1.0 C A:THR117 5.0 12.9 1.0 CG1 A:VAL121 5.0 12.8 1.0

M.Sommer, A.Negm, L.Outzen, S.Windhorst, A.Gabdulkhakov, W.Weber, C.Betzel. Unveiling the Structure, Function and Dynamics of STMPR1 in Stenotrophomonas Maltophilia Virulence. Sci Rep V. 15 20193 2025.
ISSN: ESSN 2045-2322
PubMed: 40542111
DOI: 10.1038/S41598-025-06177-5