CFAP221

Summary: The manchette localization has an experimentally grounded mouse source.

Reason: The exact A9Q751 donor is mouse Cfap221 and carries a PMID:29690537 IDA for this location. Full Results Section 2.4/Figure 8A compare Pcdp1 staining along manchette microtubules in wild-type and Spag17-knockout elongating spermatids. This supports the conserved location transfer, not a direct human assay, CFAP221 motor activity or proof that CFAP221 itself transports cargo. All donor and product fields remain unchanged.

Summary: The manchette localization has an experimentally grounded mouse source.

Reason: The exact A9Q751 donor is mouse Cfap221 and carries a PMID:29690537 IDA for this location. Full Results Section 2.4/Figure 8A compare Pcdp1 staining along manchette microtubules in wild-type and Spag17-knockout elongating spermatids. This supports the conserved location transfer, not a direct human assay, CFAP221 motor activity or proof that CFAP221 itself transports cargo. All donor and product fields remain unchanged.

Summary: CFAP221 supports normal ciliary movement.

Reason: The current IPR029676 family mapping agrees with target human evidence: PMID:31636325 measures abnormal circular ciliary waveforms despite retained ciliation, and PMID:40250778 independently measures disturbed beating and reduced bead transport in patient-derived airway cultures. Mouse loss-of-function and algal complex biochemistry corroborate the role. CFAP221 is a regulatory/axonemal component, not the ATP-driven dynein motor.

Summary: Calmodulin binding is the experimentally supported conserved molecular function.

Reason: The exact mouse A9Q751 source carries a PMID:20421426 IDA. Its Figure 2 and cloning/overlay Methods test bacterial fragments: mouse Pcdp1 residues 447-530 bind calmodulin in high calcium, and algal FAP221 binding is abolished by mutations in the tested region. The predicted mouse IQ-motif fragment was negative. Retain the ortholog inference without describing a direct human assay or assigning all four human products the same binding affinity. FAP74, not FAP221, was the algal knockdown target; those phenotypes are complex-level context.

Summary: Calmodulin binding is the experimentally supported conserved molecular function.

Reason: The exact Chlamydomonas A8J6X7 source carries a PMID:20421426 IDA. Its Figure 2 and cloning/overlay Methods test bacterial fragments: mouse Pcdp1 residues 447-530 bind calmodulin in high calcium, and algal FAP221 binding is abolished by mutations in the tested region. The predicted mouse IQ-motif fragment was negative. Retain the ortholog inference without describing a direct human assay or assigning all four human products the same binding affinity. FAP74, not FAP221, was the algal knockdown target; those phenotypes are complex-level context.

Summary: Cytoplasmic localization occurs during ciliary and spermatid protein distribution.

Reason: The mouse source is consistent with cytoplasmic Pcdp1 in elongating spermatids in PMID:29690537 and apical cytoplasmic staining in human respiratory/ependymal tissues in PMID:18039845. The latter paper also observes nonspecific residual cytoplasmic staining in mutant mice, so not every cytoplasmic signal is target-specific. Retain this broad distribution as non-core; no soluble transport activity is inferred.

Summary: Cytoplasmic localization occurs during ciliary and spermatid protein distribution.

Reason: The mouse source is consistent with cytoplasmic Pcdp1 in elongating spermatids in PMID:29690537 and apical cytoplasmic staining in human respiratory/ependymal tissues in PMID:18039845. The latter paper also observes nonspecific residual cytoplasmic staining in mutant mice, so not every cytoplasmic signal is target-specific. Retain this broad distribution as non-core; no soluble transport activity is inferred.

Summary: Human sperm imaging supports flagellar centriole localization.

Reason: The current target-specific HPA record maps flagellar centriole to this exact GO term. Approved ICC/IF with HPA042501 in human sperm reports this location together with the connecting piece. The literal antibody, cell context, GO mapping and selected image URL are recorded in CFAP221-source-evidence.json. This does not establish a general centrosomal or centriole-duplication activity.

Summary: The cytoskeleton mapping is compatible with axonemal association.

Reason: Retain the broad UniProt SL-0090 mapping because human CFAP221 localizes primarily to axonemes and conserved Pcdp1/FAP221 is associated with central-apparatus complexes. The more informative location is already represented by the axoneme rows. No independent actin/intermediate-filament activity or purified microtubule-binding assay is implied.

Summary: Human primary-cilium imaging supports this particular cilium assertion.

Reason: The current HPA target record uses HPA054164 in serum-starved hTERT-RPE1 cells and reports primary-cilium and ciliary-tip staining with approved ICC/IF reliability. The durable extract preserves the exact source/cell/antibody mapping. Retain this localization separately from the motile-airway mechanism; the imaging does not establish a primary-cilium signaling function.

Summary: Ciliary localization is established directly in human tissues.

Reason: PMID:18039845 Figure 7E-F shows CFAP221/Pcdp1 staining in human respiratory and ependymal cilia, and PMID:31636325 confirms predominantly axonemal localization in differentiated human airway cells. The broad electronic/ortholog location is therefore supported, without assigning a unique human isoform or requiring all cilia types to have the same physiological role.

Summary: Ciliary localization is established directly in human tissues.

Reason: PMID:18039845 Figure 7E-F shows CFAP221/Pcdp1 staining in human respiratory and ependymal cilia, and PMID:31636325 confirms predominantly axonemal localization in differentiated human airway cells. The broad electronic/ortholog location is therefore supported, without assigning a unique human isoform or requiring all cilia types to have the same physiological role.

Summary: CFAP221 is predominantly axonemal in differentiated human airway cells.

Reason: The original full primary study uses differentiated human bronchial/nasal epithelial cultures and reports CFAP221 localization to ciliary axonemes in Supplementary Figure 2C. The mutant cultures lose detectable specific staining but retain motile cilia. This directly supports the original location; the more precise central-apparatus complex interpretation also draws on ortholog biochemistry, not an assumed human ultrastructural reconstruction.

Summary: Axoneme association is conserved and independently supported in human cells.

Reason: Retain the original location mapping or A8J6X7 ortholog transfer. PMID:20421426 identifies algal FAP221 in the central-apparatus-associated calcium/calmodulin complex, while PMID:31636325 provides independent human airway axoneme localization. Complex purification and genetic localization are distinguished from direct isolated microtubule affinity.

Summary: Axoneme association is conserved and independently supported in human cells.

Reason: Retain the original location mapping or A8J6X7 ortholog transfer. PMID:20421426 identifies algal FAP221 in the central-apparatus-associated calcium/calmodulin complex, while PMID:31636325 provides independent human airway axoneme localization. Complex purification and genetic localization are distinguished from direct isolated microtubule affinity.

Summary: CFAP221 is associated with the microtubule-based ciliary cytoskeleton.

Reason: The ARBA annotation is consistent with human axonemal localization and conserved central-apparatus complex membership. This broad component term includes associated proteins; no direct tubulin-binding, microtubule polymerase or motor activity is inferred. Historical ARBA rule execution was not replayed.

Summary: Sperm flagellar localization is supported by mammalian tissue studies.

Reason: PMID:18039845 localizes mouse Pcdp1 to mature sperm flagella and demonstrates a late flagellar-development requirement in the mouse null model. Human sperm HPA staining emphasizes the connecting piece/flagellar centriole, and PMID:40250778 reports preserved sperm motility in one affected man. Retain the conserved location without turning a mouse developmental phenotype into an invariant human infertility mechanism.

Summary: The inherited assembly role is retained at its supported flagellar-maturation scope.

Reason: PMID:18039845 shows absent mature sperm flagella and occasional abortive tails in mouse loss-of-function, with BAC rescue; airway cilia remain assembled and ultrastructurally ordinary. PMID:32704025 adds source-linked mouse genetic interaction and aborted flagellar maturation, while motile cilia remain present. These data support a context-specific assembly/maturation role rather than a general requirement for initiating human airway ciliogenesis. Human patient cilia form in PMID:31636325, and sperm motility is retained in one PMID:40250778 patient. The conserved central-apparatus association supplies a plausible structural contribution, but its exact assembly step is unresolved. The PAINT claim is a curated ancestral-node inference, not a pairwise transfer or weak donor-count assertion. PTN002507401 placement/history was not reconstructed.

Summary: The broad electronic assembly claim has context-specific mammalian support.

Reason: PMID:18039845 shows absent mature sperm flagella and occasional abortive tails in mouse loss-of-function, with BAC rescue; airway cilia remain assembled and ultrastructurally ordinary. PMID:32704025 adds source-linked mouse genetic interaction and aborted flagellar maturation, while motile cilia remain present. These data support a context-specific assembly/maturation role rather than a general requirement for initiating human airway ciliogenesis. Human patient cilia form in PMID:31636325, and sperm motility is retained in one PMID:40250778 patient. The conserved central-apparatus association supplies a plausible structural contribution, but its exact assembly step is unresolved. Preserve the ARBA/IPR source fields rather than replace the original assertion with a source-independent human initiation claim.

Summary: The human source directly measures defective ciliary movement, while cilia still assemble.

Reason: Full PMID:31636325 Results and Figure 2 show patient-derived nasal cultures with beating cilia and no obvious routine TEM defect. The significant result is abnormal circular waveform; the reported frequency difference is not significant (p = 0.16). Refine this source-specific IMP to cilium movement, preserving every original source field. This is a lateral functional correction, not a denial of the separate mouse flagellar-maturation evidence or a change to the evidence code.

Proposed replacements: cilium movement

Summary: The mouse-derived assembly inference is supported in flagellar maturation.

Reason: PMID:18039845 shows absent mature sperm flagella and occasional abortive tails in mouse loss-of-function, with BAC rescue; airway cilia remain assembled and ultrastructurally ordinary. PMID:32704025 adds source-linked mouse genetic interaction and aborted flagellar maturation, while motile cilia remain present. These data support a context-specific assembly/maturation role rather than a general requirement for initiating human airway ciliogenesis. Human patient cilia form in PMID:31636325, and sperm motility is retained in one PMID:40250778 patient. The conserved central-apparatus association supplies a plausible structural contribution, but its exact assembly step is unresolved. Current donor GOA includes experimental mouse assembly evidence; the broad same-term mouse ISO from human is not treated as independent experimental replication.

Summary: Human HPA imaging supports ciliary-tip localization.

Reason: Approved HPA054164 ICC/IF in serum-starved hTERT-RPE1 cells maps the primary-cilium tip to GO:0097542. Preserve the experimental location as non-core; tip staining alone does not establish a tip-specific assembly, transport or signal-transduction activity. Source mapping and image receipt are retained in the evidence artifact.

Summary: CFAP221 performs its conserved motility-associated role in 9+2 cilia.

Reason: The PAINT active-in inference agrees with human airway movement defects and axoneme localization, mouse respiratory cilia, and algal central-apparatus/calmodulin complex experiments. These data support functional participation at this location, not merely its presence. The exact PTN002507401 ancestral reconstruction was not inspected; the mouse descendant evidence is legitimate grounding and is not circular.

Summary: The mouse-derived 9+2 motile-cilium location is corroborated in human epithelia.

Reason: The exact A9Q751 donor has PMID:18039845 IDA records for this location; the same study independently examines human respiratory and ependymal cilia. Human airway CFAP221 localization and waveform phenotypes in PMID:31636325 provide additional target support. Retain the original electronic assertion without claiming the HPA primary-cilium images are 9+2 motile-cilium experiments.

Summary: Human sperm staining supports the connecting-piece location.

Reason: HPA042501 approved ICC/IF in human sperm identifies the connecting piece and flagellar centriole. The HPA record explicitly maps connecting piece to GO:0120212 sperm head-tail coupling apparatus. Retain this source-supported location; no mechanical head-tail linkage activity or human sperm-assembly requirement is inferred solely from staining.