Evidence map›Paper›PMID 39172701›Full record

ArticleJournal of the American Chemical Society2024

Optimized Substrate Positioning Enables Switches in the C-H Cleavage Site and Reaction Outcome in the Hydroxylation-Epoxidation Sequence Catalyzed by Hyoscyamine 6β-Hydroxylase.

Eliott S Wenger, Ryan J Martinie, Richiro Ushimaru, Christopher J Pollock, Debangsu Sil, Aaron Li, Nhi Hoang, Gavin M Palowitch, Brandt P Graham, Irene Schaperdoth and 8 more

Abstract read
In one paragraph

Article in Journal of the American Chemical Society, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed.

  1. Article
  2. Total Synthesis of (+)-12-The Journal of organic chemistry · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Sequential oxidation of L-lysine by a non-heme iron hydroxylase.bioRxiv : the preprint server for biology · 2025
    Article
  14. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

18 authors.

Eliott S WengerDepartment of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.ORCID 0000-0001-6391-8036
Richiro UshimaruGraduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-8657, Japan.ORCID 0000-0002-4071-3326
Christopher J PollockORCID 0000-0001-5736-513X
Aaron Li
Nhi Hoang
Gavin M Palowitch
Brandt P Graham
Irene SchaperdothORCID 0000-0001-5240-3475
Ailiena O Maggiolo
Benjamin D Allen
Alexey Silakov
J Martin BollingerORCID 0000-0003-0751-8585

Funding

Mapping the Structural Basis for Mechanistic Diversity in Metalloenzyme SuperfamiliesR35GM119707 · NIGMS · PENNSYLVANIA STATE UNIVERSITY, THE · PI Amie K Boal · 2016 to 2026
$5.0M
Mechanisms of Mononuclear non-Heme-Iron EnzymesR35GM127079 · NIGMS · PENNSYLVANIA STATE UNIVERSITY, THE · PI CARSTEN KREBS · 2018 to 2026
$3.8M
Mechanisms of oxacycle- and olefin-installing iron/2-(oxo)glutarate oxygenasesR01GM113106 · NIGMS · PENNSYLVANIA STATE UNIVERSITY, THE · PI BOLLINGER, JOSEPH M, KREBS, CARSTEN · 2015 to 2018
$1.8M
The role of geometric structure in avoidance of oxygen rebound to enable aliphatic halogenation and oxacyclization by non-heme Fe(IV)-oxo (ferryl) complexesR01GM141284 · NIGMS · PENNSYLVANIA STATE UNIVERSITY, THE · PI SILAKOV, ALEXEY · 2022 to 2025
$1.5M
Mechanisms and Reprogramming of Iron/2-Oxoglutarate Desaturases and OxacyclasesR01GM118812 · NIGMS · PENNSYLVANIA STATE UNIVERSITY, THE · PI BOLLINGER, JOSEPH M, KREBS, CARSTEN · 2016 to 2019
$1.0M
Mechanistic Determination of the Non-heme Iron Enzyme Hyoscyamine-6-hydroxylaseF32GM113389 · NIGMS · PENNSYLVANIA STATE UNIVERSITY, THE · PI POLLOCK, CHRISTOPHER · 2015 to 2017
$160k
NIGMS NIH HHS F32 GM113389NIGMS NIH HHS R01 GM113106NIGMS NIH HHS R01 GM118812NIGMS NIH HHS R01 GM141284NIGMS NIH HHS R35 GM119707NIGMS NIH HHS R35 GM127079
6 · The paper itself

Abstract

Hyoscyamine 6β-hydroxylase (H6H) is an iron(II)- and 2-oxoglutarate-dependent (Fe/2OG) oxygenase that produces the prolifically administered antinausea drug, scopolamine. After its namesake hydroxylation reaction, H6H then couples the newly installed C6 oxygen to C7 to produce the drug's epoxide functionality. Oxoiron(IV) (ferryl) intermediates initiate both reactions by cleaving C-H bonds, but it remains unclear how the enzyme switches the target site and promotes (C6)O-C7 coupling in preference to C7 hydroxylation in the second step. In one possible epoxidation mechanism, the C6 oxygen would─analogously to mechanisms proposed for the Fe/2OG halogenases and, in our more recent study,

Indexed as

Mixed Function OxygenasesBiocatalysisEpoxy CompoundsHydroxylationSubstrate SpecificityEpoxy Compoundshyoscyamine (6S)-dioxygenaseMixed Function Oxygenases

Identifiers

PMID39172701
PMCPMC11374477

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.