2025-12-13_00000128|ligand|9MFZ

Streptavidin-E101Q-K121A-L124E bound to Fe(III)-biotin-pentyl-dipicolylamine cofactor; X-ray diffraction 1.55Å

Protein #1 125 residues (100% resolved)

Raw Sequence ...

MGRDEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAQARINTQWLLTSGTTEANAWASTEVGHDTFTKVK

Canonical Sequence ...

MGRDEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAQARINTQWLLTSGTTEANAWASTEVGHDTFTKVK

Non polymer #2 A1BLH

InChI=1S/C27H38N6O2S/c34-25(13-3-2-12-24-26-23(20-36-24)31-27(35)32-26)30-16-6-1-9-17-33(18-21-10-4-7-14-28-21)19-22-11-5-8-15-29-22/h4-5,7-8,10-11,14-15,23-24,26H,1-3,6,9,12-13,16-20H2,(H,30,34)(H2,31,32,35)/t23-,24-,26-/m0/s1

InChI=1S/C27H38N6O2S/c34-25(13-3-2-12-24-26-23(20-36-24)31-27(35)32-26)30-16-6-1-9-17-33(18-21-10-4-7-14-28-21)19-22-11-5-8-15-29-22/h4-5,7-8,10-11,14-15,23-24,26H,1-3,6,9,12-13,16-20H2,(H,30,34)(H2,31,32,35)/t23-,24-,26-/m0/s1

SMILES: c1ccnc(c1)CN(CCCCCNC(=O)CCCC[C@H]2[C@@H]3[C@H](CS2)NC(=O)N3)Cc4ccccn4

c1ccnc(c1)CN(CCCCCNC(=O)CCCC[C@H]2[C@@H]3[C@H](CS2)NC(=O)N3)Cc4ccccn4

Non polymer #3 FE

InChI=1S/Fe/q+3

SMILES: [Fe+3]

[Fe+3]

Biounit #1 homo-tetramer

Reference