{"gene":"PF3D7_API01900","run_date":"2026-09-08T15:24:04","timeline":{"discoveries":[{"year":1996,"finding":"PF3D7_API01900 (RPS17) is encoded on the 35 kb plastid-like (apicoplast) DNA circle of P. falciparum as one of 17 ribosomal proteins; transcription from this genome is polycistronic.","method":"Complete gene mapping of the 35 kb apicoplast DNA circle by sequence analysis","journal":"Journal of molecular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — systematic gene mapping of the entire apicoplast genome, single study but comprehensive sequencing and annotation","pmids":["8757284"],"is_preprint":false,"attribution":[{"species":"Plasmodium falciparum","strain":""}]},{"year":2016,"finding":"Apicoplast transcripts including those covering RPS17 are polycistronic and undergo extensive RNA processing involving excision of tRNA molecules at conserved sequence motifs; antisense polycistronic transcripts are also produced and processed at the same sites.","method":"Transcriptomic analysis of apicoplast RNA with identification of processing sites and conserved motifs; evidence for RNA editing","journal":"Protist","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct experimental characterization of apicoplast transcripts, single lab but multiple orthogonal analyses (processing site mapping, editing detection, antisense identification)","pmids":["27458998"],"is_preprint":false,"attribution":[{"species":"Plasmodium falciparum","strain":""}]}],"current_model":"PF3D7_API01900 (RPS17) is a ribosomal protein encoded on the P. falciparum apicoplast genome as part of a polycistronic transcription unit that undergoes tRNA-mediated cleavage and RNA editing; beyond its membership in the apicoplast small ribosomal subunit, no additional mechanistic detail about its specific function has been established in the available literature."},"narrative":{"mechanistic_narrative":"PF3D7_API01900 (RPS17) is a small-subunit ribosomal protein encoded directly on the 35 kb plastid-like (apicoplast) DNA circle of Plasmodium falciparum, where it is one of 17 ribosomal protein genes transcribed as part of a polycistronic unit [PMID:8757284]. The transcripts spanning RPS17 are processed post-transcriptionally through excision of tRNA molecules at conserved sequence motifs, with antisense polycistronic transcripts produced and cleaved at the same sites and evidence of RNA editing [PMID:27458998]. Beyond its assignment as an apicoplast small ribosomal subunit component and the maturation of its transcript, no additional mechanistic detail about the specific function of RPS17 has been characterized in the available corpus.","teleology":[{"year":1996,"claim":"Establishing where RPS17 is encoded and how it is transcribed answered whether this ribosomal protein belongs to the apicoplast genetic system rather than the nuclear genome, defining its organellar identity.","evidence":"Complete sequence mapping and annotation of the 35 kb apicoplast DNA circle, identifying RPS17 among 17 ribosomal protein genes on a polycistronic transcription unit","pmids":["8757284"],"confidence":"Medium","gaps":["Does not establish whether the RPS17 protein is actually assembled into a functional apicoplast ribosome","No evidence on protein-level expression, localization, or interaction partners"],"attribution":[{"species":"Plasmodium falciparum","strain":""}]},{"year":2016,"claim":"Characterizing apicoplast RNA processing answered how the polycistronic precursor covering RPS17 is matured, showing that tRNA excision at conserved motifs and RNA editing generate individual transcripts.","evidence":"Transcriptomic analysis of apicoplast RNA mapping processing sites, conserved motifs, antisense transcripts, and editing events","pmids":["27458998"],"confidence":"Medium","gaps":["Does not identify the nucleases or editing machinery responsible for processing","Does not establish the functional consequence of editing for the RPS17 protein","Does not link transcript maturation to ribosome assembly"],"attribution":[{"species":"Plasmodium falciparum","strain":""}]},{"year":null,"claim":"The specific molecular role of the RPS17 protein within the apicoplast small ribosomal subunit, its assembly, and its essentiality remain uncharacterized.","evidence":"No direct functional, structural, or genetic characterization of the RPS17 protein in the available corpus","pmids":[],"confidence":"Low","gaps":["No structural placement within the small subunit","No genetic knockout or knockdown phenotype","No demonstrated interaction partners at the protein level"],"attribution":[{"species":"Plasmodium falciparum","strain":""}]}],"mechanism_profile":{"molecular_activity":[],"localization":[],"pathway":[],"complexes":["apicoplast small ribosomal subunit"],"partners":[],"other_free_text":["Encoded on the 35 kb apicoplast DNA circle as one of 17 ribosomal protein genes [#0]","Transcribed polycistronically; transcript matured by tRNA excision at conserved motifs with antisense transcripts and RNA editing [#1]","No protein-level function, interactions, or genetic phenotype for PF3D7_API01900 established in the corpus"]}},"prefetch_data":{},"corpus_meta":[{"pmid":"8757284","id":"PMC_8757284","title":"Complete gene map of the plastid-like DNA of the malaria parasite Plasmodium falciparum.","date":"1996","source":"Journal of molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/8757284","citation_count":447,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["curated_ref"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"19929377","id":"PMC_19929377","title":"Susceptibility of Plasmodium falciparum isolates to doxycycline is associated with pftetQ sequence polymorphisms and pftetQ and pfmdt copy numbers.","date":"2010","source":"The Journal of infectious diseases","url":"https://pubmed.ncbi.nlm.nih.gov/19929377","citation_count":33,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["PfRPS17"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"32273345","id":"PMC_32273345","title":"Genetic ablation of the mitoribosome in the malaria parasite Plasmodium falciparum sensitizes it to antimalarials that target mitochondrial functions.","date":"2020","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/32273345","citation_count":30,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["S17"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"27458998","id":"PMC_27458998","title":"Transcripts in the Plasmodium Apicoplast Undergo Cleavage at tRNAs and Editing, and Include Antisense Sequences.","date":"2016","source":"Protist","url":"https://pubmed.ncbi.nlm.nih.gov/27458998","citation_count":16,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["curated_ref"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":4801,"output_tokens":564,"usd":0.011432,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":5169,"output_tokens":1518,"usd":0.031898,"stage2_stop_reason":"end_turn"},"total_usd":0.04333,"stage1_batch_id":"msgbatch_01S4WrhSkksYHeZXxqf3za3o","stage2_batch_id":"msgbatch_019VBBeuW6G52X8gZfsFDfb5","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1996,\n      \"finding\": \"PF3D7_API01900 (RPS17) is encoded on the 35 kb plastid-like (apicoplast) DNA circle of P. falciparum as one of 17 ribosomal proteins; transcription from this genome is polycistronic.\",\n      \"method\": \"Complete gene mapping of the 35 kb apicoplast DNA circle by sequence analysis\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — systematic gene mapping of the entire apicoplast genome, single study but comprehensive sequencing and annotation\",\n      \"pmids\": [\"8757284\"],\n      \"is_preprint\": false,\n      \"attribution\": [{\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}]\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Apicoplast transcripts including those covering RPS17 are polycistronic and undergo extensive RNA processing involving excision of tRNA molecules at conserved sequence motifs; antisense polycistronic transcripts are also produced and processed at the same sites.\",\n      \"method\": \"Transcriptomic analysis of apicoplast RNA with identification of processing sites and conserved motifs; evidence for RNA editing\",\n      \"journal\": \"Protist\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct experimental characterization of apicoplast transcripts, single lab but multiple orthogonal analyses (processing site mapping, editing detection, antisense identification)\",\n      \"pmids\": [\"27458998\"],\n      \"is_preprint\": false,\n      \"attribution\": [{\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}]\n    }\n  ],\n  \"current_model\": \"PF3D7_API01900 (RPS17) is a ribosomal protein encoded on the P. falciparum apicoplast genome as part of a polycistronic transcription unit that undergoes tRNA-mediated cleavage and RNA editing; beyond its membership in the apicoplast small ribosomal subunit, no additional mechanistic detail about its specific function has been established in the available literature.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"PF3D7_API01900 (RPS17) is a small-subunit ribosomal protein encoded directly on the 35 kb plastid-like (apicoplast) DNA circle of Plasmodium falciparum, where it is one of 17 ribosomal protein genes transcribed as part of a polycistronic unit [#0]. The transcripts spanning RPS17 are processed post-transcriptionally through excision of tRNA molecules at conserved sequence motifs, with antisense polycistronic transcripts produced and cleaved at the same sites and evidence of RNA editing [#1]. Beyond its assignment as an apicoplast small ribosomal subunit component and the maturation of its transcript, no additional mechanistic detail about the specific function of RPS17 has been characterized in the available corpus.\",\n  \"teleology\": [\n    {\n      \"year\": 1996,\n      \"claim\": \"Establishing where RPS17 is encoded and how it is transcribed answered whether this ribosomal protein belongs to the apicoplast genetic system rather than the nuclear genome, defining its organellar identity.\",\n      \"evidence\": \"Complete sequence mapping and annotation of the 35 kb apicoplast DNA circle, identifying RPS17 among 17 ribosomal protein genes on a polycistronic transcription unit\",\n      \"pmids\": [\n        \"8757284\"\n      ],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Does not establish whether the RPS17 protein is actually assembled into a functional apicoplast ribosome\",\n        \"No evidence on protein-level expression, localization, or interaction partners\"\n      ],\n      \"attribution\": [\n        {\n          \"species\": \"Plasmodium falciparum\",\n          \"strain\": \"\"\n        }\n      ]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Characterizing apicoplast RNA processing answered how the polycistronic precursor covering RPS17 is matured, showing that tRNA excision at conserved motifs and RNA editing generate individual transcripts.\",\n      \"evidence\": \"Transcriptomic analysis of apicoplast RNA mapping processing sites, conserved motifs, antisense transcripts, and editing events\",\n      \"pmids\": [\n        \"27458998\"\n      ],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Does not identify the nucleases or editing machinery responsible for processing\",\n        \"Does not establish the functional consequence of editing for the RPS17 protein\",\n        \"Does not link transcript maturation to ribosome assembly\"\n      ],\n      \"attribution\": [\n        {\n          \"species\": \"Plasmodium falciparum\",\n          \"strain\": \"\"\n        }\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The specific molecular role of the RPS17 protein within the apicoplast small ribosomal subunit, its assembly, and its essentiality remain uncharacterized.\",\n      \"evidence\": \"No direct functional, structural, or genetic characterization of the RPS17 protein in the available corpus\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"No structural placement within the small subunit\",\n        \"No genetic knockout or knockdown phenotype\",\n        \"No demonstrated interaction partners at the protein level\"\n      ],\n      \"attribution\": [\n        {\n          \"species\": \"Plasmodium falciparum\",\n          \"strain\": \"\"\n        }\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\n        \"term_id\": \"GO:0003735\",\n        \"supporting_discovery_ids\": [0]\n      }\n    ],\n    \"localization\": [\n      {\n        \"term_id\": \"GO:0009536\",\n        \"supporting_discovery_ids\": [0, 1]\n      }\n    ],\n    \"pathway\": [\n      {\n        \"term_id\": \"GO:0006396\",\n        \"supporting_discovery_ids\": [1]\n      }\n    ],\n    \"complexes\": [\n      \"apicoplast small ribosomal subunit\"\n    ],\n    \"partners\": [],\n    \"other_free_text\": [\n      \"Encoded on the 35 kb apicoplast DNA circle as one of 17 ribosomal protein genes [#0]\",\n      \"Transcribed polycistronically; transcript matured by tRNA excision at conserved motifs with antisense transcripts and RNA editing [#1]\",\n      \"No protein-level function, interactions, or genetic phenotype for PF3D7_API01900 established in the corpus\"\n    ]\n  }\n}","audit_flag":null,"strains":[{"strain":"Pf3D7","gene_id":"PF3D7_API01900","name":null,"product":"apicoplast ribosomal protein S17","uniprot_acc":null,"chromosome":null,"start_pos":null}],"gene_symbol":"RPS17","evaluation":null}