GABRB3 encodes the beta3 contribution to pentameric GABA-A receptors. Full-length human alpha1/beta3/gamma2 receptors provide direct structural and functional evidence for ligand interfaces and chloride conductance; engineered beta3 homomers are a separate experimental system. Native human brain preparations also contain beta3, including mixed beta2/beta3 assemblies, but alpha1-based purification and surgical sampling do not define every physiological receptor composition. These observations support a single receptor/channel core rather than separate universal functions for every recombinant composition (PMID:30602789(https://pubmed.ncbi.nlm.nih.gov/30602789/), PMID:24909990(https://pubmed.ncbi.nlm.nih.gov/24909990/), PMID:39843743(https://pubmed.ncbi.nlm.nih.gov/39843743/)).
Rat beta3-specific freeze-fracture labeling establishes postsynaptic and extrasynaptic membrane pools. The original authors explicitly leave the contribution of the extrasynaptic particles to pyramidal tonic currents unresolved and discuss transient membrane pools. Functional human alpha4/beta3/delta assemblies independently establish the relevant receptor capability. The extrasynaptic core process is therefore a synthesis of compartment and receptor-function evidence, not an assertion that the imaging study directly measured ambient-GABA responses (PMID:21073549(https://pubmed.ncbi.nlm.nih.gov/21073549/), PMID:35355020(https://pubmed.ncbi.nlm.nih.gov/35355020/)). The older rat localization source uses beta2/3-reactive labeling and cannot independently isolate beta3 (PMID:9464994(https://pubmed.ncbi.nlm.nih.gov/9464994/)).
Receptor contact formation is context dependent. In the neuron/HEK coculture study, beta3-containing receptors increased inhibitory presynaptic contacts; the vesicle-release experiment presented for beta2 must not be reassigned to beta3. Mouse receptor-subunit work and physiological neuronal-current studies support additional developmental and transmission contexts, with construct/species distinctions retained (PMID:25489750(https://pubmed.ncbi.nlm.nih.gov/25489750/), PMID:27129275(https://pubmed.ncbi.nlm.nih.gov/27129275/), PMID:12522165(https://pubmed.ncbi.nlm.nih.gov/12522165/)). The beta3 knockout cochlear abstract reports reduced afferent density and a neuropathy, but does not resolve formation versus maintenance of innervation. Its four precise developmental/innervation assertions remain undecided. Beta2-specific early-development and later-degeneration timing cannot fill that gap (PMID:17021187(https://pubmed.ncbi.nlm.nih.gov/17021187/)).
The negative-regulation NAS claim is a source-specific regulator-versus-regulated-product mismatch. The complete main text of the cited review assigns negative receptor trafficking and transmission to CLPTM1 and changes in receptor kinetics to SHISA7; beta3-containing receptors are the regulated assemblies. This supports removing that particular assertion without claiming that beta3 can never have any regulatory role (PMID:33234346(https://pubmed.ncbi.nlm.nih.gov/33234346/)). Likewise, parent-of-origin regulation of GABRB3 expression does not establish the encoded receptor subunit as an imprinting effector; the broad biological claim is marked over-annotated with the original provenance retained (PMID:15878204(https://pubmed.ncbi.nlm.nih.gov/15878204/)).
Several historical sources support a correct biological claim without independently resolving the exact original beta3 assay. The epsilon-subunit paper describes human epsilon assembly with alpha and beta subunits, not a verified beta3 clone or baculovirus experiment. Its three original beta3 annotations remain accepted through independent human beta3 receptor evidence, with the source limit explicit (PMID:9039914(https://pubmed.ncbi.nlm.nih.gov/9039914/)). The alpha1/beta2/gamma2 structural paper likewise supplies receptor-family context, while independent beta3 evidence grounds the beta3-specific judgment (PMID:29950725(https://pubmed.ncbi.nlm.nih.gov/29950725/)). Unrecovered individual assays are not evidence of wrong-gene attribution. The dendritic-spine and cytoplasmic-vesicle assertions remain undecided where the exact beta3 grounding is unresolved (PMID:25025157(https://pubmed.ncbi.nlm.nih.gov/25025157/), PMID:25172774(https://pubmed.ncbi.nlm.nih.gov/25172774/)).
The human variant study measures expressed beta3 using a beta2/3-reactive antibody in controlled transfections with mock subtraction; the antibody itself is not beta3-specific. Gating changes and reduced surface abundance differ among variants. The paper's wild-type/heterozygous/homozygous terminology denotes expression conditions, not direct measurements in patient cells. Historical transcript-variant names are retained without assigning a modern UniProt suffix (PMID:26950270(https://pubmed.ncbi.nlm.nih.gov/26950270/)).
Four current products are preserved by exact sequence: P28472-1 and -2 are different 473-residue precursors, and -3/-4 are 402/388 residues. Engineered intracellular-loop replacements, BRIL insertions, tags, nanobody-bound structures and historical transcript names are not natural splice-product identities. PMID:35140402 calls its mature beta3 sequence 1–447, whereas the current 473-residue precursor minus the first 25 residues is 448 residues; PMID:24909990 explicitly uses precursor residues 26–473. That source-coordinate discrepancy is preserved rather than converted into a product change (PMID:18514161(https://pubmed.ncbi.nlm.nih.gov/18514161/), PMID:22243422(https://pubmed.ncbi.nlm.nih.gov/22243422/), PMID:35140402(https://pubmed.ncbi.nlm.nih.gov/35140402/)). The engineered alpha5/beta3 letter was read through the indexed original PMC main text and Figure 1 caption; its supplement-defined sequence was not inspected (PMID:30140029(https://pmc.ncbi.nlm.nih.gov/articles/PMC6123483/)).
Seven PAINT assertions were traced through the actual PTHR18945 tree and literal IBD records. The target sequence matches human AN2283/PTN002498409. The source version difference for plasma membrane is preserved: 66 incoming donors versus 147 in the later retained literal record. Self-donors are legitimate experimental grounding, and donor count is not used as a weakness. No target-specific loss or contrary negative placement was identified.
The single incoming extension conjunction remains literal: GABAergic synaptic-transmission context and chloride output, CHEBI:17996. It does not say that GABA is the output. The source record's contributes_to relationship is preserved for raw0. Ordinary enables fields elsewhere remain immutable provenance while the molecular core explicitly describes beta3's contribution to the receptor complex.
This private proposal contains 97 original contexts, 69 ACCEPT, 11 MODIFY, 8 KEEP_AS_NON_CORE, 7 UNDECIDED, one MARK_AS_OVER_ANNOTATED and one REMOVE; no NEW annotation is proposed. Eleven refinements include nine verified is_a descendants and two explicitly semantic, evidence-based changes without fabricated ancestry. Four short source excerpts appear only at their review/core placements; this journal does not duplicate them. Genuine native acquisition, source-title/access reconciliation and target validation remain future work.
The earlier prospective counts and native-work statements above are historical. The existing lane completed one genuine fetch and seed after all 49 normal sources were present: nine exact main sources, ten exact published GABRA1 sources, seven exact GABRB2 native sources and 23 native missing-only PMID acquisitions. All 97 literal contexts join the actual 16-column export and parser. The canonical UniProt record remains byte-identical; all four product declarations and retained sequences agree. Raw0 maps to native38 with contributes_to intact. Raw5 maps to native2, where its original GABAergic-context AND chloride-output atoms are restored together. Nine native title spellings were reconciled and all four short excerpts match the normal caches exactly. No normal source was edited.
The genuinely recovered full main text of PMID:17021187 was read for beta3 separately from beta2. Rare fragile beta3 null animals limited sampling; the early P10/P21 series tests alpha5/beta2, no beta3 was killed for six-week histopathology, and beta3 progression with age was explicitly not tested. Positive mature cochlear dysfunction and later afferent/hair-cell phenotypes remain, while the four precise developmental or innervation-formation claims remain UNDECIDED. This supersedes the old abstract-only access description without borrowing beta2 developmental timing. Images, supplements and numeric Table1 cells remain outside the inspected scope (PMID:17021187(https://pmc.ncbi.nlm.nih.gov/articles/PMC1806703/)).
Among the other source-specific unresolved assessments, PMID:14993607, PMID:25172774 and PMID:9039914 remain abstract-only in the native caches. PMID:25025157 is the same already-read full cache with unresolved beta3-specific spine grounding. Newly available full caches for other supporting papers are recorded as availability, not a claim of complete new reading. All 97 approved actions, 41 manual reference judgments, one core and four products are retained. Native CREATE history and target checks follow.
Ontology-loaded target validation passed with 30 optional evidence-excerpt/supporting-reference advisories and no errors. Strict GOA comparison passed for all 97 annotations. The computed status is DRAFT. Four short excerpts are verified against exact normal-cache bytes; no extra quotation was introduced during validation. The initial INITIALIZED status mismatch is preserved, followed by the matching DRAFT report. Five reference notes and one reason now explicitly date earlier access failures where native full-text caches became available; this is availability precision, not new reading or a biological action change. All 49 scientific sources remain unchanged. Native history validation, private rendering/link checks and scoped whitespace results accompany the final candidate.
The preceding entries are an append-only journal. Their dated acquisition and validation statements record earlier work, not additional biological evidence. The current source guide provides the concise reading summary, and the review YAML contains the current judgments.
The receptor-binding inference is now marked over-annotated: the mouse autoradiography measures receptor ligand sites, while structural subunit contacts alone do not establish the specific signaling-receptor-binding function. The positive receptor/channel evidence is retained (PMID:12672542(https://pubmed.ncbi.nlm.nih.gov/12672542/), PMID:30602789(https://pubmed.ncbi.nlm.nih.gov/30602789/)). Beta3 self-association remains a demonstrated secondary assembly property. It occurs in the engineered homomer and in recombinant heteromers with adjacent beta3 subunits; none of these preparations establishes physiological native beta3 homopentamers (PMID:24909990(https://pubmed.ncbi.nlm.nih.gov/24909990/), PMID:35355020(https://pubmed.ncbi.nlm.nih.gov/35355020/)). Newly inspected selected cross-linking Results and Methods identify human beta3 expressed in Sf9 cells, with oxidation and reduction controls; images and raw blots were not inspected (PMID:16537435(https://pubmed.ncbi.nlm.nih.gov/16537435/)).
The four cochlear developmental judgments remain uncertain after full-text reading. Six-week dysfunction and older beta3 afferent/hair-cell loss are positive observations, but the early histological comparison tests alpha5 and beta2, and beta3 longitudinal progression was not tested. This differs from the imprinting claim, where the experiment concerns regulation of the gene rather than the channel protein performing epigenetic imprinting. Selective exact excerpts now anchor these distinctions and the molecular/complex refinements; stronger result excerpts replace the two earlier core method excerpts. The source caches remain unchanged (PMID:17021187(https://pmc.ncbi.nlm.nih.gov/articles/PMC1806703/), PMID:15878204(https://pubmed.ncbi.nlm.nih.gov/15878204/)).
The portable archive now omits superseded forecast and execution-state duplication while retaining every original context, actual join, product sequence, literal extension group and PAINT/source record. The earlier complete projection remains available at the immutable published commit linked from the archive. Ontology-loaded target validation passed with 29 optional evidence-excerpt/supporting-reference advisories and no errors. Strict GOA comparison passed for all 97 annotations; the computed DRAFT status matches. All 49 scientific source files and the published derived GO cache remain byte-exact. The genuine native EDIT records this follow-up.
Two earlier semantic replacements are withdrawn after checking current official definitions and is_a/part_of paths. The original signal-transduction TAS assertion and chloride-channel-complex IPI assertion remain ACCEPT, with the original human-cloning and rat-receptor evidence scopes explicit and independent human receptor evidence retained. GABA signaling pathway and GABA-A receptor complex are already represented elsewhere; no hierarchical edge is asserted between either replacement pair. A new ontology question records the relationship issue. Nine supported hierarchical refinements remain. The current tally is 71 ACCEPT, nine MODIFY, seven KEEP_AS_NON_CORE, seven UNDECIDED, two MARK_AS_OVER_ANNOTATED and one REMOVE; no NEW annotation. All 97 original contexts, four products, core terms, 41 reference assessments, 13 exact excerpt occurrences, literal conjunction and immutable sources remain unchanged. The prior journal remains historical and append-only. Ontology-loaded target validation passed with 29 optional evidence-excerpt/supporting-reference advisories and no errors. Strict GOA comparison passed for all 97 original annotations and the computed DRAFT status matches. All 49 scientific sources, the source archive and the published derived GO cache remain byte-exact. Native EDIT history, private rendering/link checks and scoped whitespace checks passed.
Fresh official QuickGO responses independently confirm the two questioned relationships. The complete is_a/part_of ancestor sets and zero-hit path responses are preserved with dates, URLs and hashes in the source evidence. The positive paths are GO:0007214 is_a GO:0007267 cell-cell signaling and GO:1902711 is_a GO:1902710 is_a GO:0043235 receptor complex. Neither queried original term occurs in the corresponding complete ancestor set. Independent human receptor gating and chloride currents still support both original ACCEPT assertions; term-name analogy and unrelated gene precedents do not substitute for these actual relationships.
The chloride-channel-complex row now uses the already retained functional-current excerpt from PMID:35355020, whose Methods identify the measured whole-cell chloride current. The old stoichiometry excerpt remains as historical provenance. The live precomposed GO:1904315 MF was explicitly considered and retained for the supported combined channel/postsynaptic role. No action, source, core, product or machine field changes.
Current counts remain 71 ACCEPT, 9 MODIFY, 7 KEEP_AS_NON_CORE, 7 UNDECIDED, 2 MARK_AS_OVER_ANNOTATED and 1 REMOVE across all 97 originals. Earlier dated journal counts describe earlier decisions. All 49 scientific sources, four products, two extension atoms and the literal contributes_to relationship remain unchanged. There are 13 current excerpt occurrences, with 20 total words from PMID:35355020. Ontology-loaded target validation passed with 29 optional evidence-excerpt/supporting-reference advisories and no errors. Strict GOA matching passed for all 97 original contexts, and computed status remains DRAFT. Native EDIT history, private render/link checks and scoped whitespace checks passed. All 49 scientific source bytes and the derived term caches remain unchanged.