DNA replication factor A complex
Enable an agent to recognize a DNA replication factor A complex, assess its assembly and single-stranded DNA-binding state, and judge its suitability for a specified biological interpretation or experiment.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 17 findings · 34 questions
RPA identity and composition Resolve what molecular assembly the registry name denotes and which constituents instantiate it.
Name and taxon resolution
Connect the registry entry to authoritative complex terminology and organism-specific records.
Registered complex correspondence
Establish whether DNA replication factor A complex denotes canonical RPA and document the supported taxonomic scope.
- Which authoritative complex or ontology record explicitly connects this registry name to replication protein A? definition
- Does the supporting record define a cross-species complex class or an organism-specific assembly? boundary
Constituent resolution
Identify the actual subunits and distinguish canonical composition from substitutions or incomplete assemblies.
Subunit membership and copy number
Record constituent accessions, sequence versions and experimentally supported stoichiometry.
- Which sequence-identified subunits and copy numbers constitute the complex in this organism? definition
- What evidence distinguishes the assembled complex from co-detected free subunits? measurement
- Does a paralog substitution remain a variant of this registry thing or require a link to a distinct complex? boundary
Assembly and domain integrity Describe constituent completeness, domain organization and the physical integrity of the assembly.
Construct and domain coverage
Map the experimental material to complete subunit sequences and relevant domains.
Represented RPA regions
Identify retained and missing regions before applying structural or functional observations to the full complex.
- Which residue ranges, tags and mutations are present in each constituent? provenance
- Which DNA-binding, assembly or partner-interaction regions are absent or altered? boundary
Physical assembly state
Assess whether the expected assembly persists under the conditions of use.
Intact complex fraction
Separate intact complexes from dissociated constituents, aggregates and mixtures.
- What measurements establish assembly size, constituent ratios and sample homogeneity? measurement
- Under which concentration, buffer and temperature conditions does the assembly remain intact? measurement
- What loss of assembly integrity disqualifies the preparation for the intended experiment? action
Single-stranded DNA engagement Describe substrate-dependent binding, DNA coverage and the dynamics of association and release.
Substrate and affinity
Define the DNA substrate and conditions required to interpret binding measurements.
Conditional DNA binding
Record binding as an assay-specific property rather than a context-free affinity constant.
- What are the DNA sequence, length, secondary structure and single-stranded or junction configuration? definition
- What affinity is measured at the stated salt concentration, temperature and protein-to-DNA ratio? measurement
- Which controls distinguish ssDNA engagement from nonspecific association or assay interference? measurement
Occupancy and exchange
Resolve how much DNA is engaged and how rapidly complexes redistribute.
DNA coverage and residence
Record footprint, occupancy and exchange without assuming a single invariant binding mode.
- How many nucleotides are engaged per complex, and how was that footprint inferred? measurement
- What residence time or association and dissociation rates are supported by the experiment? measurement
- Does the evidence resolve individual complexes, neighboring complexes or an averaged DNA-bound population? boundary
Regulation and pathway interfaces Relate molecular modifications and partner engagement to a bounded functional context.
Modification-dependent state
Characterize measured modifications and the evidence connecting them to altered behavior.
Site-resolved regulatory state
Record modifications by constituent and residue while separating observation from inferred functional consequences.
- Which modification sites and occupancies were measured in this organism and preparation? measurement
- Does a claimed functional effect derive from a directly modified complex, a substitution mutant or correlation alone? provenance
Partner engagement and functional context
Record the interfaces through which this complex participates in larger DNA-processing systems.
Supported partner and pathway assignment
Link direct interaction, localization and functional evidence without treating them as interchangeable.
- Which protein partners interact directly with this complex, and is the interaction dependent on DNA or modification state? measurement
- What evidence places the observed complex in replication, repair or recombination rather than establishing only colocalization? provenance
- Which claimed outcome requires additional machinery and therefore belongs to a pathway model? boundary
Preparation and functional fitness Determine whether a particular preparation supports the intended measurement or intervention.
Preparation history and contaminants
Track production and handling factors that can change the interpretation of RPA assays.
Assay-relevant preparation quality
Record sample origin, handling and contaminants that could mimic or obscure DNA-binding behavior.
- Was the complex isolated natively or reconstituted, and what purification and storage history is documented? provenance
- What residual nucleic acid, nuclease activity or free-subunit contamination was measured? measurement
- Which preparation defects require cleanup, requalification or rejection before use? action
Functional qualification
Tie acceptance of a preparation to a defined assay and the limits of the supporting evidence.
Use-specific activity evidence
Define what the preparation has demonstrably been qualified to do.
- What fraction of the stated complex concentration is active in the reference DNA-binding assay? measurement
- Which positive and negative controls establish suitability for the proposed downstream experiment? action
- Which conclusions remain unsupported because qualification used another substrate, construct or organism? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of DNA replication factor A complex this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- Replication protein A complex, Replication protein A complex, RPA2 variant, Replication protein A complex, RPA4 variant
What it is Filled
DNA replication factor A complex, usually called replication protein A (RPA), is a eukaryotic heterotrimeric protein complex that binds single-stranded DNA, protects it from degradation and secondary-structure formation, and coordinates proteins involved in DNA replication, repair and recombination.
In scope
- Organism-specific identity and correspondence to replication protein A nomenclature
- Subunit composition, sequence variants and intact-complex assembly
- Single-stranded DNA binding, occupancy and exchange
- Complex-associated modifications and interactions in replication, repair and recombination
- Preparation integrity and evidence supporting functional assessments
Out of scope
- Standalone models of constituent genes and isolated subunits
- Complete DNA replication, repair or recombination pathways
- DNA polymerases, helicases and replication factor C complexes
- Bacterial single-stranded DNA-binding proteins and other distinct binding complexes
- Commercial reagent formulations, packaging and supplier operations
Why it exists Filled
Enable an agent to recognize a DNA replication factor A complex, assess its assembly and single-stranded DNA-binding state, and judge its suitability for a specified biological interpretation or experiment.
Distinguishing features Filled
- Require evidence of an assembled RPA complex rather than detection of one constituent subunit; a human RPA structural record identifies a heterotrimer with 1:1:1 stoichiometry. [RCSB PDB 8RK2](https://www.rcsb.org/structure/8RK2)
- Test preferential engagement of single-stranded DNA under stated conditions; ssDNA binding and coating are documented for yeast RPA. [RCSB PDB 6I52](https://www.rcsb.org/structure/6i52)
- Use subunit sequence identities and assembly evidence to distinguish RPA from other single-stranded DNA-binding proteins; binding alone does not establish identity.
- Distinguish the complex from replication factor C, DNA polymerase and helicase by constituent identities and measured activity rather than the shared word replication.
- Identify whether evidence concerns a full complex or an engineered fragment; an isolated RPA large-subunit DNA-binding domain is not evidence for complete-complex assembly. [RCSB PDB 1FGU](https://www.rcsb.org/structure/1FGU)
What robots and AI may and may not do Filled
Must not
- Confuse the RPA complex with unrelated proteins or abbreviations.
- Present research findings on RPA as clinical guidance.
- Fabricate or alter experimental data about the complex.
Only with a human decision
- Publishing interpretations of RPA variants found in a person's genome.
May
- Explain the role of replication protein A in DNA replication and repair from cited sources.
- Annotate RPA subunits and genes in datasets the agent is authorized to edit.
Moral aspects Filled
- Research on DNA repair underlies cancer studies, where overstatement misleads patients.
- Genetic findings about individuals carry privacy risk.
Who is affected
- Researchers
- Patients in studies
- Readers of research
Owners Filled
Steward
Nobody owns the molecule; the laboratory answers for its samples and data.
Master systems
- Protein and gene databases
Links to other meta-models Filled
parent
- Q112998292 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.dna-replication-factor-a-complex
- Wikidata: Q21109588 (https://www.wikidata.org/wiki/Q21109588)
Direct properties required Filled
- Organism and molecular identity: Taxonomy identifier, complex accession and constituent sequence accessions
- Subunit composition and stoichiometry: Named subunits with copy counts; canonical, variant or unresolved composition
- Construct coverage: Full-length, truncated, tagged or mutated; residue boundaries for each subunit
- Assembly integrity: Intact, partially dissociated, aggregated or unresolved, with method and conditions
- Apparent ssDNA-binding affinity: Kd in nM or µM, with substrate, buffer, temperature and binding model
- DNA-binding footprint: Nucleotides per bound complex under specified conditions
- DNA association and dissociation kinetics: Association rate in M^-1 s^-1, dissociation rate in s^-1, or residence time in s
- Modification state: Subunit, residue, modification and occupancy; unmeasured recorded separately from absent
- DNA and protein partners: Partner identity, directness of interaction, occupancy and experimental context
- Active preparation fraction: Percentage or molar fraction competent in a specified binding assay
Recognition required Filled
- Not visible to the eye; identified by its three subunits in protein gels and by sequence in databases.
- Structural models show oligonucleotide-binding folds wrapped around single-stranded DNA.
Capabilities and actions required Filled
- Resolve a named RPA preparation to its organism, constituent sequences and construct boundaries.
- Assess whether a sample contains an intact complex suitable for a specified assay.
- Compare ssDNA binding and exchange measurements under compatible conditions.
- Evaluate whether modification or partner-binding evidence supports a proposed functional state.
- Select or reject a preparation for replication, repair or recombination experiments using recorded acceptance criteria.
- Flag interpretations that extrapolate from isolated domains, incomplete assemblies or another species.
Hazards and failure modes required Filled
- Misannotation of subunits spreads errors through databases.
- Overinterpreting laboratory results can mislead clinical expectations.
Standards and interfaces required Filled
- The Gene Ontology cellular component classification, maintained by the Gene Ontology Consortium, includes the DNA replication factor A complex for biological annotation.
Context of use required Filled
- Replication protein A functions in eukaryotic cells wherever exposed single-stranded DNA requires protection and coordination with DNA processing proteins.
- It is studied in research on DNA replication, repair, recombination and cellular responses to replication stress.
- Purified complexes are used in biochemical experiments that examine DNA binding and interactions among DNA metabolism proteins.
Sources Filled
- Wikidata item Q21109588: DNA replication factor A complex - identity and sense of the item
- Wikipedia: Replication protein A - general description of the item
Open questions
- Which authoritative identifier establishes the exact correspondence between the registry label DNA replication factor A complex and canonical replication protein A?
- Does this registry entry encompass organism-specific and alternative-subunit RPA complexes, or should some be linked as distinct registered things?
- Does an existing Vercy world model already own this concept and require this entry to link to it?
- Which quantitative binding, footprint and exchange measurements are sufficiently comparable to support reference ranges?
- Which modification-dependent and partner-dependent effects are established for each covered organism rather than inferred from another species?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q21109588/spec.json