The approved human symbol is CCDC39 (HGNC:25244), with reviewed UniProt Q9UFE4 / CCD39_HUMAN and secondary accession B4E2H1. The normal record encodes 941 residues and declares two products. Both product objects and all 30 seeded annotation source objects are preserved. The shorter isoform is not assigned an experimentally established separate function. The frozen ClinGen association remains autosomal recessive primary ciliary dyskinesia 14, Definitive; the functional review does not alter that association or its historical assessment.
The normal perplexity deep-research attempt failed before producing research because the offline resolver could not obtain deep-research-client[cyberian]==0.2.7rc1. The actual failure is retained as native chunk b5689d. These notes are manual primary-source research, and no provider-named report was authored. UniProt, GOA and cached publications remain unchanged.
PMID:21131972(https://pubmed.ncbi.nlm.nih.gov/21131972/) combines human respiratory-cell localization and ultrastructure with dog genetics and zebrafish perturbation. Its complete cached abstract, unique target Results/Discussion paragraphs and available Methods container were read. Human CCDC39 deficiency removes the axonemal signal, DNALI1-containing inner dynein arms and GAS8/DRC localization while preserving tested outer-arm markers. Affected males have oligoasthenospermia. Two zebrafish morpholinos disrupt laterality, southpaw expression and heart looping; human CCDC39 mRNA rescues that phenotype. The human rescue construct was amplified from HEK293T cDNA, which is distinct from directly perturbing the developing human heart. No raw microscopy, supplementary video or patient-table reanalysis was performed.
PMID:21131974(https://pubmed.ncbi.nlm.nih.gov/21131974/) mainly studies CCDC40 but directly measures CCDC39 localization. Complete selected Results/Discussion and Methods were read. CCDC39 is present along control human respiratory axonemes but accumulates in the apical cytoplasm/ciliary base of CCDC40-deficient cells. Omission of primary antibodies is documented. Mouse and fish Ccdc40 experiments are not reattributed to CCDC39. The cytoplasmic staining does not resolve whether the particular mouse cytosol transfer represents a soluble pool or another associated compartment.
PMID:23255504(https://pubmed.ncbi.nlm.nih.gov/23255504/) supplies direct human CCDC39 ultrastructural and high-speed video measurements. Complete nonduplicated Methods, Results and Discussion containers were read. Inner dynein arms are depleted while outer arms remain apparent, and many cilia are immotile; motile subsets have altered beat pattern and frequency. The sperm finding is explicitly data not shown. The detailed radial-spoke immunofluorescence example is a CCDC40 patient. It establishes that presence of radial-spoke components need not mean their correct positioning, but is not a separately performed CCDC39 experiment.
PMID:22499950(https://pubmed.ncbi.nlm.nih.gov/22499950/) is not simply an incidental heterotaxy citation. The unchanged canonical cache is abstract-only. Its independently authenticated normal artifact contains a richer XML body, from which relevant complete Methods, Results and Discussion paragraphs were separately read. The body identifies CCDC39-homozygous PCD controls 9028 and 9098; it links 9028 to characteristic ultrastructure and an abnormal-motion video. This supports the existing cilium-movement annotation alongside independent CCDC39 studies. The artifact body is an external evidence projection, not a replacement for the canonical cache, and no artifact-only text is quoted in the review. Supplementary tables and videos were not independently inspected. The primary full-text location is PMC3770728.
PMID:26387594(https://pubmed.ncbi.nlm.nih.gov/26387594/) contains actual anti-CCDC39 Methods and human diagnostic localization evidence despite foregrounding GAS8. Selected complete respiratory-cell Methods, Results and Discussion paragraphs were read. The authors distinguish CCDC39/CCDC40-associated loss of GAS8 from GAS8-mutant cases retaining CCDC39 and DNALI1. This supports the location and assembly relationship without turning CCDC39 into an intraflagellar-transport motor. PMID:27120127(https://pubmed.ncbi.nlm.nih.gov/27120127/) independently identifies CCDC39/CCDC40 immunofluorescence in human respiratory cilia in its verified abstract. Its detailed Methods were not accessed; the location is accepted with corroboration from the directly read original studies, not with a false claim of full access.
PMID:37258679(https://pubmed.ncbi.nlm.nih.gov/37258679/) is already available as a canonical full-text cache. Its identity/abstract and selected complete human Results, figure-6 caption and Methods paragraphs were read. Human nasal epithelial cells were expanded at air–liquid interface. Patient ID04 has a homozygous CCDC39 frameshift, while a separate patient has a CCDC40 deletion. Cryo-EM places the CCDC39–CCDC40 coiled coil within the human 96-nm repeat; deficient axonemes lack recognizable 96-nm periodicity, while the 24-nm outer-arm repeat remains. Mutant and control reconstructions were matched for particle numbers and resolution. Radial spokes can enter deficient cilia and bind sporadically, separating entry from proper periodic docking. Specific tether interactions illustrated using Chlamydomonas are not asserted as independently resolved human contacts. No raw maps, supplementary structures or figure pixels were reanalysed.
The proposed GO:0005200 molecular function describes contribution to cytoskeletal structural integrity. It is grounded in human structural placement plus selective structural perturbation, beyond a generic knockout-necessity argument. CCDC39 contributes the scaffold; dynein supplies motor ATPase activity. One core combines this structural MF with inner-dynein-arm assembly and cilium movement at the axoneme. No new biological-process assertion is proposed, and no ancestor/descendant MF duplicate exists among the seeded annotations.
The official GO definition and parents were checked in a distinct bounded ontology consultation. Same-role comparator inquiries considered CCDC40 and DRC1, but complete current annotation exports were inaccessible; the available UniProt tables are slimmed. Their displayed absence of a term is therefore not treated as a convention or a missing-curation argument. The local GO-CAM index had no exact Q9UFE4/CCDC39 match. That negative local lookup does not prove no model exists elsewhere and is not itself evidence for NEW.
The extracellular-region IEA is traceable to GO_REF:0000108 and the left-right epithelial-cilium movement source. Official ontology links connect that process through epithelial extracellular-fluid movement and extracellular transport to an extracellular location. This explains the logical route, not a secretion experiment. The actual target scaffold is inside the membrane-enclosed axoneme. Removal of this particular inferred location follows the mismatch between process geography and molecule location; it does not assert that every possible extracellular release of CCDC39 has been experimentally excluded.
GO:0060285 denotes movement of a cell, whereas airway epithelial cilia ordinarily move fluid. The existing human sperm observations provide the appropriate cell-motility context. They support retention of the IMP and PAINT assertions without equating fluid movement with locomotion. PAINT annotations are ancestral functional judgments; inclusion of human CCDC39 in their descendant evidence is legitimate and not circular. The exact family tree and ancestral placement were not reconstructed here.
The measured beat-frequency change is retained as a non-core regulatory phenotype of the organized apparatus, not as evidence of an acute signaling switch. Motile-cilium assembly is retained even though deficient cells still make cilia: assembly includes arranging their internal parts. Protein localization refers to selected components reaching or remaining at an axonemal destination; the data do not show universal import control.
PMID:22693285(https://pubmed.ncbi.nlm.nih.gov/22693285/) was verified using official PubMed and publisher-indexed metadata and the complete abstract. The publisher body returned 403. The study directly reports human CCDC39/CCDC40 clinical genetics, ciliary ultrastructure and sperm abnormalities, but the detailed organ-specific observations were not accessible. Lung development, pancreatic laterality, digestive-tract laterality and liver laterality remain UNDECIDED. Heart looping is retained non-core using the independently read human-mRNA rescue in zebrafish, with the original clinical-source limitation stated explicitly. No organ-specific process is removed from abstract silence, and respiratory disease is not equated with a demonstrated lung-morphogenesis mechanism.
The five remaining uncertainties are those four organ-specific processes and the mouse-derived cytosol location. They are source-specific limitations, not a claim that CCDC39 lacks all developmental effects. Useful future curation work is to inspect the original clinical phenotype tables and trace the exact mouse cytosol experiment. Biological questions concern the shorter isoform and how cytoplasmic preassembly interacts with periodic docking.
All eight cited PMID records retain their canonical titles and access flags. Five contain full-body text; three canonical records remain abstract-only, including the richer-artifact case described above. Reference identity verification is separated from confirmation of every annotation: VERIFIED does not claim the inaccessible developmental mechanisms were established. GO-reference method pages were checked directly, with the logical-inference route also independently consulted. No correction or withdrawal was inferred from failed access. Quotations are limited to exact canonical substrings, with no more than 25 aggregate words from any one source and no additional quotations in these notes.
The 30 source assertions and two product objects remain exact. The review contains 17 ACCEPT, 7 KEEP_AS_NON_CORE, 1 REMOVE and 5 UNDECIDED source decisions, plus one NEW structural molecular function. Canonical application, standard CREATE history, final rendering and publication require normal candidate checks, distinct whole-science review and ROOT acceptance. Source caches and prior provenance are preserved.