Notes: Subunit of the V1 (cytosolic) component of the lysosomal v-ATPase. The V0 and V1 components of the v-ATPase assemble during amino acid starvation creating the active v-ATPase that pumps protons into the lysosome for acidification. The v-ATPase also engages in amino acid-dependent interactions with the Ragulator complex. In the presence of amino acids, the v-ATPase-Ragulator complex undergoes a conformational change that results in Ragulator exerting its GEF activity on RAGA/B.
PN references (titles):
Regulation of mTORC1 by amino acids - ScienceDirect
Cells | Free Full-Text | SEA and GATOR 10 Years Later | HTML (mdpi.com)
Eukaryotic V-ATPase: Novel structural findings and functional insights - ScienceDirect
The emerging roles of vacuolar-type ATPase-dependent Lysosomal acidification in neurodegenerative diseases | Translational Neurodegeneration | Full Text (biomedcentral.com)
PN-node mapping records (path + ancestors):
[subtype] Autophagy-Lysosome Pathway|Pre-initiation autophagy signaling|mTORC1 pathway, upstream|Nutrient sensing|V1 lysosomal v-ATPase proton pump component
status=mapped scope=ok_for_propagation_to_go GO=[GO:0046612 lysosomal proton-transporting V-type ATPase, V1 domain]
rationale: This PN leaf is restricted to V1-sector lysosomal V-ATPase components. The GO lysosomal V1-domain component term is the direct target.
[type] Autophagy-Lysosome Pathway|Pre-initiation autophagy signaling|mTORC1 pathway, upstream|Nutrient sensing
status=no_mapping scope= GO=[]
rationale: Reviewed as a contextual PN role. The label is useful for curator triage, but by itself does not support a universal GO assertion for all member genes beyond curated ancestor or child mappings.
[group] Autophagy-Lysosome Pathway|Pre-initiation autophagy signaling|mTORC1 pathway, upstream
status=no_mapping scope= GO=[]
rationale: Reviewed as a broad PN taxonomy container. The descendants mix components, regulators, context labels, and mechanistic leaves, so propagation should come only from narrower curated nodes.
[class] Autophagy-Lysosome Pathway|Pre-initiation autophagy signaling
status=context_only scope=too_broad_to_propagate GO=[GO:0010506 regulation of autophagy]
rationale: This class organizes upstream signaling inputs to autophagy initiation. Because the subtree contains generic insulin, AMPK, mTORC1, nutrient-sensing, and miscellaneous signaling components, class-level propagation to regulation of autophagy would over-annotate many genes.
[branch] Autophagy-Lysosome Pathway
status=no_mapping scope= GO=[]
rationale: Reviewed as the top-level PN branch. It is a project taxonomy umbrella rather than a direct GO assertion; all propagation must come from manually curated child nodes.
Notes: Subunit of the V1 (cytosolic) component of the lysosomal v-ATPase. The V0 and V1 components of the v-ATPase assemble during amino acid starvation creating the active v-ATPase that pumps protons into the lysosome for acidification. The v-ATPase also engages in amino acid-dependent interactions with the Ragulator complex. In the presence of amino acids, the v-ATPase-Ragulator complex undergoes a conformational change that results in Ragulator exerting its GEF activity on RAGA/B.
PN references (titles):
Regulation of mTORC1 by amino acids - ScienceDirect
Cells | Free Full-Text | SEA and GATOR 10 Years Later | HTML (mdpi.com)
Eukaryotic V-ATPase: Novel structural findings and functional insights - ScienceDirect
The emerging roles of vacuolar-type ATPase-dependent Lysosomal acidification in neurodegenerative diseases | Translational Neurodegeneration | Full Text (biomedcentral.com)
PN-node mapping records (path + ancestors):
[subtype] Autophagy-Lysosome Pathway|Lysosomal catabolism|Regulation of lysosomal environment|Lysosomal acidification|V1 lysosomal v-ATPase proton pump component
status=mapped scope=ok_for_propagation_to_go GO=[GO:0033176 proton-transporting V-type ATPase complex]
rationale: This PN subtype denotes the V1-sector component of the lysosomal V-ATPase. In the current GO cache, the broader V-type ATPase complex is the safest validated target for this component role.
[type] Autophagy-Lysosome Pathway|Lysosomal catabolism|Regulation of lysosomal environment|Lysosomal acidification
status=mapped scope=ok_for_propagation_to_go GO=[GO:0007042 lysosomal lumen acidification]
rationale: This PN group directly names the lysosomal acidification mechanism. Propagation to the GO lysosomal lumen acidification term is an exact mechanistic match.
[group] Autophagy-Lysosome Pathway|Lysosomal catabolism|Regulation of lysosomal environment
status=no_mapping scope= GO=[]
rationale: Reviewed as a broad PN taxonomy container. The descendants mix components, regulators, context labels, and mechanistic leaves, so propagation should come only from narrower curated nodes.
[class] Autophagy-Lysosome Pathway|Lysosomal catabolism
status=no_mapping scope= GO=[]
rationale: Reviewed as a broad lysosomal-degradation container. The subtree includes carbohydrate, lipid, protein, nuclease, phosphatase, sulfatase, and environment-regulation roles, so mapping should occur at the enzyme or process subtype level.
[branch] Autophagy-Lysosome Pathway
status=no_mapping scope= GO=[]
rationale: Reviewed as the top-level PN branch. It is a project taxonomy umbrella rather than a direct GO assertion; all propagation must come from manually curated child nodes.