National Center for
Biotechnology Information

8XMB: NTP-bound Pol IV transcription elongation complex

PDB ID:

MMDB ID:

250225

PDB Deposition Date:

2023/12/27

Updated in MMDB:

2025/07

Experimental Method:

electron microscopy

Resolution:

3.4 Å

Source Organism:

synthetic construct▼

Taxonomy	Molecule
synthetic construct	N, O, Q
Arabidopsis thaliana	A, B, C, D, E, F, G, H, I, J, K, L, M

Similar Structures:

Biological Unit for 8XMB: hexadecameric; determined by author

Molecular Components in 8XMB
Label	Count	Molecule
Proteins (13 molecules)
A	1	DNA-directed RNA Polymerase IV Subunit 1
B	1	DNA-directed RNA Polymerases IV and V Subunit 2
C	1	DNA-directed RNA Polymerases II, IV and V Subunit 3
D	1	DNA-directed RNA Polymerases IV and V Subunit 4
E	1	DNA-directed RNA Polymerases II and IV Subunit 5A
F	1	DNA-directed RNA Polymerases II, IV and V Subunit 6A
G	1	DNA-directed RNA Polymerase IV Subunit 7
H	1	DNA-directed RNA Polymerases II, IV and V Subunit 8B
I	1	DNA-directed RNA Polymerases II, IV and V Subunit 9A
J	1	DNA-directed RNA Polymerases II, IV and V Subunit 10
K	1	DNA-directed RNA Polymerases II, IV and V Subunit 11
L	1	DNA-directed RNA Polymerases II, IV and V Subunit 12
M	1	RNA-dependent RNA Polymerase 2
Nucleotides(3 molecules)
N	1	Nontemplate_dna
O	1	RNA
Q	1	Template_dna
Chemicals and Non-standard biopolymers (12 molecules)
1	9	ZINC ION
2	2	MAGNESIUM ION
3	1	GUANOSINE-5'-TRIPHOSPHATE

* Click molecule labels to explore molecular sequence information.

Citing MMDB