7OC4

Alpha-humulene synthase AsR6 from Sarocladium schorii in complex with thiolodiphosphate and a cyclized reaction product.

PDB DOI: https://doi.org/10.2210/pdb7OC4/pdb

Classification: BIOSYNTHETIC PROTEIN
Organism(s): Sarocladium sp. 'schorii
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2021-04-26 Released: 2021-07-07
Deposition Author(s): Schotte, C., Lukat, P., Deuschmann, A., Blankenfeldt, W., Cox, R.J.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.03 Å
R-Value Free: 0.188
R-Value Work: 0.156
R-Value Observed: 0.157

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.2 of the entry. See complete history.

Literature

Understanding and Engineering the Stereoselectivity of Humulene Synthase.

Schotte, C., Lukat, P., Deuschmann, A., Blankenfeldt, W., Cox, R.J.

(2021) Angew Chem Int Ed Engl 60: 20308-20312

PubMed: 34180566 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1002/anie.202106718
Primary Citation of Related Structures:
7OC4, 7OC5, 7OC6

PubMed Abstract:
The non-canonical terpene cyclase AsR6 is responsible for the formation of 2E,6E,9E-humulene during the biosynthesis of the tropolone sesquiterpenoid (TS) xenovulene A. The structures of unliganded AsR6 and of AsR6 in complex with an in crystallo cyclized reaction product and thiolodiphosphate reveal a new farnesyl diphosphate binding motif that comprises a unique binuclear Mg ²⁺ -cluster and an essential K289 residue that is conserved in all humulene synthases involved in TS formation. Structure-based site-directed mutagenesis of AsR6 and its homologue EupR3 identify a single residue, L285/M261, that controls the production of either 2E,6E,9E- or 2Z,6E,9E-humulene. A possible mechanism for the observed stereoselectivity was investigated using different isoprenoid precursors and results demonstrate that M261 has gatekeeping control over product formation.

Organizational Affiliation

Institute for Organic Chemistry and BMWZ, Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.

Macromolecule Content

Total Structure Weight: 98.5 kDa
Atom Count: 6,660
Modelled Residue Count: 775
Deposited Residue Count: 864
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-humulene synthase AsR6	A, B	432	Sarocladium sp. 'schorii	Mutation(s): 0 Gene Names: asR6 EC: 4.2.3.104
UniProt
Find proteins for A0A2U8U2L5 (Sarocladium schorii) Explore A0A2U8U2L5 Go to UniProtKB: A0A2U8U2L5
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	A0A2U8U2L5
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
V8Z Query on V8Z Download Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain N [auth B] MOL2 format, chain F [auth A] MOL2 format, chain N [auth B] mmCIF format, chain F [auth A] mmCIF format, chain N [auth B]	F [auth A], N [auth B]	(1E,4E,8E)-2,6,6,9-Tetramethyl-1,4-8-cycloundecatriene C₁₅ H₂₄ FAMPSKZZVDUYOS-HRGUGZIWSA-N		Interactions Focus chain F [auth A] Focus chain N [auth B]
MES Query on MES Download Ideal Coordinates CCD File SDF format, chain G [auth A] MOL2 format, chain G [auth A] mmCIF format, chain G [auth A]	G [auth A]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C₆ H₁₃ N O₄ S SXGZJKUKBWWHRA-UHFFFAOYSA-N		Interactions Focus chain G [auth A]
PIS (Subject of Investigation/LOI) Query on PIS Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain M [auth B] MOL2 format, chain D [auth A] MOL2 format, chain M [auth B] mmCIF format, chain D [auth A] mmCIF format, chain M [auth B]	D [auth A], M [auth B]	TRIHYDROGEN THIODIPHOSPHATE H₃ O₆ P₂ S HWTUHTNZLQJJEV-UHFFFAOYSA-M		Interactions Focus chain D [auth A] Focus chain M [auth B]
BU3 Query on BU3 Download Ideal Coordinates CCD File SDF format, chain E [auth A] MOL2 format, chain E [auth A] mmCIF format, chain E [auth A]	E [auth A]	(R,R)-2,3-BUTANEDIOL C₄ H₁₀ O₂ OWBTYPJTUOEWEK-QWWZWVQMSA-N		Interactions Focus chain E [auth A]
ZN (Subject of Investigation/LOI) Query on ZN Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain L [auth B] MOL2 format, chain C [auth A] MOL2 format, chain L [auth B] mmCIF format, chain C [auth A] mmCIF format, chain L [auth B]	C [auth A], L [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain L [auth B]
MG (Subject of Investigation/LOI) Query on MG Download Ideal Coordinates CCD File SDF format, chain H [auth A] SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain K [auth A] SDF format, chain O [auth B] SDF format, chain P [auth B] MOL2 format, chain H [auth A] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain K [auth A] MOL2 format, chain O [auth B] MOL2 format, chain P [auth B] mmCIF format, chain H [auth A] mmCIF format, chain I [auth A] mmCIF format, chain J [auth A] mmCIF format, chain K [auth A] mmCIF format, chain O [auth B] mmCIF format, chain P [auth B]	H [auth A] I [auth A] J [auth A] K [auth A] O [auth B] H [auth A], I [auth A], J [auth A], K [auth A], O [auth B], P [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain O [auth B] Focus chain P [auth B]