CACrown ArchivesThe cinema collection
EN/FR
Search
Menu
Research dossier · General Reference

7-carboxy-7-deazaguanine synthase

class of enzymes

Cross-disciplinary reference desk with index cards, atlas, dictionary and catalogue
General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 10, 2025
Entity authorityQ13408722 ↗
Source-derived summary

7-Carboxy-7-deazaguanine synthase (EC 4.3.99.3, 7-carboxy-7-carbaguanine synthase, queE (gene)) is an enzyme with systematic name 6-carboxy-5,6,7,8-tetrahydropterin ammonia-lyase. This enzyme catalyses the following chemical reaction

6-carboxy-5,6,7,8-tetrahydropterin

⇌

{\displaystyle \rightleftharpoons }

7-carboxy-7-carbaguanine + NH3

The enzyme is a member of the superfamily of S-adenosyl-L-methionine-dependent radical enzymes.

Editorial summary

“7-carboxy-7-deazaguanine synthase” enters the record as class of enzymes. Crown Archives preserves that source wording while asking what 7-carboxy-7-deazaguanine, synthase and class can confirm, complicate or overturn.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current 43-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its strongest next move is a source search built around 7-carboxy-7-deazaguanine, synthase and class.
Editorial analysis

Why this record matters

“7-carboxy-7-deazaguanine synthase” is worth following because a concise public description often conceals a longer documentary argument. Here, 7-carboxy-7-deazaguanine, synthase and class provides the most credible route into that argument.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 10, 2025. The linked authority identifier is Q13408722. None of the 0 selected statements returned an explicit reference.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “7-carboxy-7-deazaguanine synthase”, its source revision and the description used here.
  2. Expand the search: follow 7-carboxy-7-deazaguanine synthase primary sources, 7-carboxy-7-deazaguanine synthase archive and 7-carboxy-7-deazaguanine research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “7-carboxy-7-deazaguanine synthase”?
  2. Which cited source is closest to the event, object or claim?
  3. Which institution is responsible for the underlying evidence?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “7-carboxy-7-deazaguanine synthase” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.