The biological synthesis is one N-DRC scaffold activity. DRC2 coassembles with other structural subunits and contributes to axonemal organization and control of beating. This structural work supports the existing assembly assertions; failure to eliminate whole ciliary projections is not evidence against component assembly. The N-DRC and dynein motor complexes are distinct, so motor-complex membership is corrected while assembly participation is retained. PMID:24094744(https://pmc.ncbi.nlm.nih.gov/articles/PMC3791264/) and PMID:37258679(https://doi.org/10.1038/s41586-023-06140-2).
The human 2013 Results report preserved outer arms and reduced inner arms/nexin links; Figure 6B more broadly describes normal dynein arms. The review preserves this internal distinction and avoids claiming universal absence or preservation of all arms. The algal FAP250 mutation and genomic rescue establish selective N-DRC/associated-inner-arm assembly. C21orf59 rescue and planarian assays in the same paper are not DRC2 experiments. Human fertility was not established for the DRC2 cohort.
The human 2023 structural specimen is respiratory ALI-derived axonemes. Supplementary Table 3 explicitly identifies DRC2/Q8IXS2/484 in N-DRC. Detailed scaffold geometry is algal; human predicted homologous subcomplexes were fitted to density. The existing sperm-motility assertion remains positive with independently demonstrated human sperm-tail localization and conserved mechanical participation, without inventing a human sperm perturbation in either paper. PMID:17089017(https://www.spandidos-publications.com/ijmm/18/6/1119/download) reports a capacitation-associated gel shift, but neither its chemistry nor its causal role was established.
Figure 3C of PMID:29257953(https://pmc.ncbi.nlm.nih.gov/articles/PMC5752135/#F3) shows the tagged human CCDC65 basal-body pool. That observation is retained alongside mature N-DRC localization, without assuming an endogenous isoform-specific pool or a separate basal-body mechanism. Failed supplementary downloads returned challenge/error content and were not interpreted as workbooks or PDFs.
The controlled DRC1–DRC2 co-IP in PMID:34169321(https://pubmed.ncbi.nlm.nih.gov/34169321/) supports a positive association. DRC1 is independently established as a cytoskeletal N-DRC protein, supporting the informative binding class without imposing a purified-contact or physiological-regulation prerequisite. The introduced ORF species and sequence remain unauthenticated; the human host alone does not resolve them. No stable IntAct identifier was recovered for this pair by the bounded query, so the public locator is the original Figure 4 rather than an invented database record.
The current PTHR21625 tree, target alignment and four literal IBD assertions were reconstructed. All four assertions occupy PTN000492844, and human DRC2 descends through PTN002502524; the target MSA sequence matches Q8IXS2-1. Donor identities are not interchangeable with experiment organisms. In particular, Q32KY1 is bovine DRC1, Q384U1 is trypanosome DRC2/CMF70, Q3USS3 maps mouse MGI:2685906, and the zebrafish source maps to Q6DHI2. Current exports need not reproduce every historical donor record. A target's own experimental evidence among IBD sources is legitimate, not circular. PANTHER family.
Official products are 484 and 497 residues. The early AF382188/AAK60542 clone is also 484 residues but carries N202D and A242T, both documented sequence conflicts; it is not an exact current-product match or a third natural isoform. No equivalent activity is inferred for the 497-residue product. Independent original reading and deposited-sequence comparison establish these distinctions; immutable abstract-only caches remain unchanged.
The scaffold MF is a compact synthesis, not an added annotation row. No NEW process is proposed. The axonemal nexin-link complex already places the core in the axoneme, so the redundant broad location slot is omitted while the source-specific basal-body row remains. Source qualifiers and imported evidence objects are preserved. Generality is addressed with supported replacements under the scoped project instructions.
The ordinary isolated fetch generated all 15 source rows and both official products. Genuine Falcon research failed authentication, and its perplexity-lite fallback failed with HTTP 401 insufficient_quota; no provider report was fabricated. Manual source reading and independent core consultation supply the evidence. The source guide separates cached text from independently recovered original material. Only three short publication excerpts are reproduced once each: 6 words from 24094744 in the core, 3 from 34169321 in the binding row, and 7 from 17089017 in the sperm-motility row. No original-only passage was inserted into a cached-publication quotation field.
The shared PMID:20876659 machine cache is abstract-only; its full_text_available flag is false and remains preserved. The full source used for selected Methods and Results was independently recovered original HTML, not that cache. The reference assessment and source guide now state this distinction explicitly.
Axoneme and motile cilium are retained as anatomical locations, alongside the distinct axonemal nexin-link complex membership. This supersedes the earlier location-to-complex replacements and the paragraph above omitting the core location slot. The three source location rows are accepted without changing their imported qualifiers. The separate tagged basal-body observation remains non-core.
The assembly rationale is grounded primarily in the algal FAP250/DRC2 mutation and genomic rescue: Figure 6H–J and the FAP250 Results section show restoration of N-DRC and associated inner-arm structure. The human Results report reduced inner arms and nexin links, whereas Figure 6B describes normal arms; both statements remain part of the source assessment. That internal discrepancy is not an abstract-only access gap and is not resolved by discarding the separately recovered full original. The normal publication cache remains abstract-only. The later structural study distinguishes demonstrated algal IDAe dependence from unresolved human IDAe docking dependence.
The integrated scaffold core now records axonemal location separately from complex membership and includes cilium movement as well as its regulation. Associated dynein-complex assembly is part of axoneme assembly; the accepted sperm-motility context is a descendant application of cilium movement. Their source rows remain positive without repeating every descendant term in the compact core. Human sperm-tail localization and conserved flagellar function support this application; the cited studies do not establish a human DRC2 sperm perturbation or a causal capacitation mechanism. The new scaffold excerpt is used once in the core. Detailed contacts were resolved in algae, with human homologous model placement, so the review retains a synthesized scaffold MF without manufacturing a new human experimental annotation.
The product descriptions retain the 484/497-residue identities, the VSP_024644 terminal replacement and the historical N202D/A242T sequence conflicts. Endogenous antibody localization is not isoform-specific, and the available work does not establish equivalent assembly or localization for the 497-residue product. Clinical frameshifts and engineered algal alleles remain distinct from natural products. No machine source, cached access flag or historical note has been changed.
The binding refinement remains positive: DRC1 is a protein component of the axonemal microtubule cytoskeleton and therefore fits the cytoskeletal protein binding definition. The term is not restricted to motor or filament-polymer partners. Tagged co-IP establishes the reported association, while introduced-sequence and direct-contact limits remain explicit. The three inherited excerpts remain unchanged; the additional 17-word excerpt from PMID:37258679 appears only in the core, with no duplicate quotation here.