9M1A: Vitamin D3 receptor

Vitamin D receptor complex with a diethyldiphenylsilane derivative. Determined by X-ray diffraction at 1.78 Å resolution. Released 11 Jun 2025.

Method: X-ray diffraction
Resolution: 1.78 Å
Organisms: Rattus norvegicus, Homo sapiens
Chains: 2
Atoms: 2,342
Mol. weight: 32.68 kDa
Ligands: A1L78
Released: 11 Jun 2025

Explore 9M1A in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9M1A contains 14 α-helices and 3 β-strands across 2 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 13 helices, 3 β-strands

Element	Residues	Length	Sheet
α-helix	126-142	17
α-helix	148-152	5
α-helix	154-156	3
α-helix	223-241	19
α-helix	247-249	3
α-helix	252-271	20
β-strand	275-276	2	1
β-strand	281-283	3	1
β-strand	290-291	2	1
α-helix	293-297	5
α-helix	303-318	16
α-helix	323-334	12
α-helix	345-366	22
α-helix	375-402	28
α-helix	404-407	4
α-helix	412-418	7

Chain C: 1 helix, 0 β-strands

Element	Residues	Length	Sheet
α-helix	628-633	6

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Vitamin D3 receptor	A	protein	271	Rattus norvegicus	P13053 (AlphaFold model)
Mediator of RNA polymerase II transcription subunit 1	C	protein	13	Homo sapiens	Q15648 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>9M1A_1 Vitamin D3 receptor (chains A)
GSHMGSPNSPLKDSLRPKLSEEQQHIIAILLDAHHKTYDPTYADFRDFRPPVRMDGSTGS
VTLDLSPLSMLPHLADLVSYSIQKVIGFAKMIPGFRDLTSDDQIVLLKSSAIEVIMLRSN
QSFTMDDMSWDCGSQDYKYDVTDVSKAGHTLELIEPLIKFQVGLKKLNLHEEEHVLLMAI
CIVSPDRPGVQDAKLVEAIQDRLSNTLQTYIRCRHPPPGSHQLYAKMIQKLADLRSLNEE
HSKQYRSLSFQPENSMKLTPLVLEVFGNEIS

Sequence of entity 2 (C), FASTA

>9M1A_2 Mediator of RNA polymerase II transcription subunit 1 (chains C)
KNHPMLMNLLKDN

Ligands and cofactors

ID	Name	Formula	Copies
A1L78	(4~{S})-5-[4-[diethyl-[4-(2-ethyl-2-oxidanyl-butoxy)-3-methyl-phenyl]silyl]-2-m…	C29 H44 O6 Si	1

Primary citation

Structure-activity relationship and crystallographic analyses of non-secosteroidal vitamin D receptor ligands bearing diphenylsilane core as a hydrophobic pharmacophore. Mudiyanselage, H.N.T.N., Misawa, T., Ochiai, K. et al. Bioorg Med Chem (2025) 128:118261-118261. DOI 10.1016/j.bmc.2025.118261 · PubMed

Other PDB entries of the same protein (UniProt P13053 (AlphaFold model), which also has an AlphaFold model), best resolution first:

9VOG 1.43 Å, Vitamin D receptor complex with a 5-{4-(m-carboran-1-yl)phenoxy}-4-hydroxypentanoic acid…
9M1D 1.44 Å, Vitamin D receptor complex with a methyldiphenylpropylsilane derivative
3VTC 1.5 Å, Crystal structure of rat vitamin D receptor bound to a partial agonist…
3VT7 1.65 Å, Crystal structures of rat VDR-LBD with W282R mutation
9M1C 1.67 Å, Vitamin D receptor complex with a triphenylpropylsilane derivative
9M13 1.68 Å, Vitamin D receptor complex with a dimethyldiphenylsilane derivative
2ZMI 1.7 Å, Crystal Structure of Rat Vitamin D Receptor Bound to Adamantyl Vitamin D Analogs:…
3VT3 1.7 Å, Crystal structures of rat VDR-LBD with R270L mutation
2O4J 1.74 Å, Crystal Structure of Rat Vitamin D Receptor Ligand Binding Domain Complexed with VitIII…
9VOL 1.75 Å, Vitamin D receptor complex with a 4-{4-(m-carboran-1-yl)-2-methylphenoxy}butanoic acid…
9M1B 1.77 Å, Vitamin D receptor complex with a diphenydipropylsilane derivative
3W0H 1.8 Å, Crystal Structure of Rat VDR Ligand Binding Domain in Complex with Novel…

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