{"gene":"PF3D7_0814200","run_date":"2026-09-08T12:51:27","timeline":{"discoveries":[{"year":2011,"finding":"ALBA1 (PfAlba1) was isolated as part of a molecular complex associated with the P. falciparum-specific TARE6 subtelomeric region; electromobility shift assays (EMSAs) demonstrated that ALBA1 binds to TARE6 DNA repeats and to single-stranded RNA (ssRNA) probes, establishing it as a dual DNA/RNA-binding protein. In early blood stages, ALBA1 was enriched at the nuclear periphery and partially co-localized with PfSir2 (a TARE6-associated histone deacetylase); at trophozoite-schizont transition, ALBA1 was also detectable in the cytoplasm in a punctate pattern, indicating developmentally regulated intracellular localization.","method":"Molecular complex isolation, electromobility shift assays (EMSA) with TARE6 DNA and ssRNA probes, immunofluorescence co-localization with PfSir2, subcellular fractionation/imaging across life-cycle stages","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal complex isolation, direct binding assays (EMSA) with both DNA and RNA substrates, co-localization with known chromatin factor, replicated across two orthogonal methods in a single rigorous study","pmids":["22167473"],"is_preprint":false,"attribution":[{"species":"Plasmodium falciparum","strain":""}]},{"year":2015,"finding":"ALBA1 (PfAlba1) is essential for asexual intra-erythrocytic proliferation of P. falciparum. Deep sequencing of affinity-purified ALBA1-associated RNAs in trophozoites identified 1,193 bound transcripts; for 105 of these, steady-state mRNA levels significantly changed upon ALBA1 overexpression, demonstrating a role in mRNA homeostasis. Binding of ALBA1 to four erythrocyte invasion mRNAs (Rap1, RhopH3, CDPK1, AMA1) in trophozoites was linked to translational repression, whereas release of these mRNAs from the ALBA1 complex in mature stages correlated with active protein synthesis, establishing ALBA1 as a regulator of translational timing.","method":"Conditional knockdown (essentiality), epitope-tag affinity purification followed by deep RNA sequencing (RIP-seq), RNA-seq for steady-state mRNA levels, polysome/translational analysis across intraerythrocytic stages","journal":"Genome biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (knockdown essentiality, RIP-seq, mRNA homeostasis analysis, translational stage-correlation) in a single focused study on ALBA1","pmids":["26415947"],"is_preprint":false,"attribution":[{"species":"Plasmodium falciparum","strain":""}]}],"current_model":"In Plasmodium falciparum, ALBA1 (PfAlba1, PF3D7_0814200) is an essential dual DNA/RNA-binding protein that, in early blood stages, localises to the nuclear periphery in association with the TARE6 subtelomeric region and the histone deacetylase PfSir2, and then redistributes to cytoplasmic foci at the trophozoite-schizont transition; in trophozoites it binds ~1,193 mRNAs and represses translation of erythrocyte invasion transcripts (Rap1, RhopH3, CDPK1, AMA1), releasing them for protein synthesis in mature stages, thereby acting as a master regulator of translational timing during intra-erythrocytic development."},"narrative":{"mechanistic_narrative":"In Plasmodium falciparum, ALBA1 (PF3D7_0814200) is an essential dual DNA/RNA-binding protein that governs translational timing during intra-erythrocytic development [PMID:26415947]. It was isolated as part of a molecular complex associated with the parasite-specific TARE6 subtelomeric region, and direct EMSA binding assays show it engages both TARE6 DNA repeats and single-stranded RNA, defining its dual nucleic-acid-binding activity [PMID:22167473]. ALBA1 displays developmentally regulated localization: in early blood stages it is enriched at the nuclear periphery and partially co-localizes with the TARE6-associated histone deacetylase PfSir2, whereas at the trophozoite-schizont transition it also appears as cytoplasmic puncta [PMID:22167473]. Functionally, ALBA1 is required for asexual proliferation and binds ~1,193 trophozoite transcripts; its association with erythrocyte invasion mRNAs (Rap1, RhopH3, CDPK1, AMA1) is linked to translational repression, and their release in mature stages correlates with active protein synthesis, establishing ALBA1 as a regulator of the timing of invasion-gene expression [PMID:26415947]. Beyond these findings, no further mechanistic detail — including structural basis of nucleic-acid recognition or the composition of its repressive complex — has been characterized in the available corpus.","teleology":[{"year":2011,"claim":"It was unknown what molecular activity ALBA1 possessed; showing it binds both TARE6 subtelomeric DNA and ssRNA established it as a dual DNA/RNA-binding protein with developmentally regulated localization.","evidence":"Molecular complex isolation, EMSA with TARE6 DNA and ssRNA probes, and immunofluorescence co-localization with PfSir2 across life-cycle stages in P. falciparum","pmids":["22167473"],"confidence":"High","gaps":["The structural basis and sequence specificity of DNA versus RNA recognition were not defined","The functional consequence of PfSir2 co-localization at TARE6 was not established","The trigger for the nuclear-to-cytoplasmic redistribution was not identified"],"attribution":[{"species":"Plasmodium falciparum","strain":""}]},{"year":2015,"claim":"Whether ALBA1's RNA binding had a physiological role was unresolved; demonstrating essentiality, genome-wide transcript binding, and stage-dependent translational repression established it as a master regulator of translational timing for invasion genes.","evidence":"Conditional knockdown essentiality, RIP-seq of affinity-purified ALBA1-associated RNAs, RNA-seq under overexpression, and translational stage-correlation in P. falciparum trophozoites","pmids":["26415947"],"confidence":"High","gaps":["The mechanism by which ALBA1 represses translation of bound mRNAs was not resolved","The signal driving release of invasion mRNAs in mature stages was not identified","Whether ALBA1 acts alone or within a larger repressive ribonucleoprotein complex was not defined"],"attribution":[{"species":"Plasmodium falciparum","strain":""}]},{"year":null,"claim":"How ALBA1 mechanistically switches from a nuclear TARE6/chromatin-associated role to a cytoplasmic translational repressor, and what protein partners mediate each function, remains unknown.","evidence":"","pmids":[],"confidence":"High","gaps":["No structural model of nucleic-acid binding","Composition of the cytoplasmic repressive complex uncharacterized","Regulatory link between subtelomeric DNA binding and mRNA repression unestablished"],"attribution":[{"species":"Plasmodium falciparum","strain":""}]}],"mechanism_profile":{"molecular_activity":[],"localization":[],"pathway":[],"complexes":["TARE6-associated subtelomeric molecular complex"],"partners":["PFSIR2 (CO-LOCALIZATION AT NUCLEAR PERIPHERY)"],"other_free_text":["Binds ~1,193 trophozoite mRNAs including the invasion transcripts Rap1, RhopH3, CDPK1 and AMA1","Essential for asexual intra-erythrocytic proliferation of P. falciparum","Displays developmentally regulated nuclear-to-cytoplasmic redistribution at the trophozoite-schizont transition"]}},"prefetch_data":{},"corpus_meta":[{"pmid":"10693754","id":"PMC_10693754","title":"A simple RNA analysis method shows var and rif multigene family expression patterns in Plasmodium falciparum.","date":"2000","source":"Molecular and biochemical parasitology","url":"https://pubmed.ncbi.nlm.nih.gov/10693754","citation_count":234,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["RNA"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"6204268","id":"PMC_6204268","title":"Determination of nuclear DNA of five eucoccidian parasites, Isospora (Toxoplasma) gondii, Sarcocystis cruzi, Eimeria tenella, E. acervulina and Plasmodium berghei, with special reference to gamontogenesis and meiosis in I. (T.) gondii.","date":"1984","source":"Parasitology","url":"https://pubmed.ncbi.nlm.nih.gov/6204268","citation_count":88,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["DNA"],"competing_organism_flag":true,"competing_organism_match":"Toxoplasma","competing_organism_only":false},{"pmid":"26525978","id":"PMC_26525978","title":"A bioinformatic survey of RNA-binding proteins in Plasmodium.","date":"2015","source":"BMC genomics","url":"https://pubmed.ncbi.nlm.nih.gov/26525978","citation_count":62,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["RNA"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"22167473","id":"PMC_22167473","title":"PfAlbas constitute a new eukaryotic DNA/RNA-binding protein family in malaria parasites.","date":"2011","source":"Nucleic acids research","url":"https://pubmed.ncbi.nlm.nih.gov/22167473","citation_count":60,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["curated_ref"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"27230797","id":"PMC_27230797","title":"Translational regulation in blood stages of the malaria parasite Plasmodium spp.: systems-wide studies pave the way.","date":"2016","source":"Wiley interdisciplinary reviews. RNA","url":"https://pubmed.ncbi.nlm.nih.gov/27230797","citation_count":54,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["RNA"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"26415947","id":"PMC_26415947","title":"The PfAlba1 RNA-binding protein is an important regulator of translational timing in Plasmodium falciparum blood stages.","date":"2015","source":"Genome biology","url":"https://pubmed.ncbi.nlm.nih.gov/26415947","citation_count":50,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["PfALBA1"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"28787542","id":"PMC_28787542","title":"ALBA4 modulates its stage-specific interactions and specific mRNA fates during Plasmodium yoelii growth and transmission.","date":"2017","source":"Molecular microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/28787542","citation_count":38,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["RNA"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false},{"pmid":"39868986","id":"PMC_39868986","title":"Ectopic overexpression of Plasmodium falciparum DNA-/RNA-binding Alba proteins misregulates virulence gene homeostasis during asexual blood development.","date":"2025","source":"Microbiology spectrum","url":"https://pubmed.ncbi.nlm.nih.gov/39868986","citation_count":3,"is_preprint":false,"source_species":["Pf"],"role":"primary","match_terms":["PfALBA1"],"competing_organism_flag":false,"competing_organism_match":"","competing_organism_only":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":7153,"output_tokens":1020,"usd":0.01838,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":5759,"output_tokens":1919,"usd":0.038385,"stage2_stop_reason":"end_turn"},"total_usd":0.056765,"stage1_batch_id":"msgbatch_01DisAaTypwmC8QwdMBuePHo","stage2_batch_id":"msgbatch_0184zxZTqxiEfdYYfPMfkqjb","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2011,\n      \"finding\": \"ALBA1 (PfAlba1) was isolated as part of a molecular complex associated with the P. falciparum-specific TARE6 subtelomeric region; electromobility shift assays (EMSAs) demonstrated that ALBA1 binds to TARE6 DNA repeats and to single-stranded RNA (ssRNA) probes, establishing it as a dual DNA/RNA-binding protein. In early blood stages, ALBA1 was enriched at the nuclear periphery and partially co-localized with PfSir2 (a TARE6-associated histone deacetylase); at trophozoite-schizont transition, ALBA1 was also detectable in the cytoplasm in a punctate pattern, indicating developmentally regulated intracellular localization.\",\n      \"method\": \"Molecular complex isolation, electromobility shift assays (EMSA) with TARE6 DNA and ssRNA probes, immunofluorescence co-localization with PfSir2, subcellular fractionation/imaging across life-cycle stages\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal complex isolation, direct binding assays (EMSA) with both DNA and RNA substrates, co-localization with known chromatin factor, replicated across two orthogonal methods in a single rigorous study\",\n      \"pmids\": [\"22167473\"],\n      \"is_preprint\": false,\n      \"attribution\": [\n        {\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"ALBA1 (PfAlba1) is essential for asexual intra-erythrocytic proliferation of P. falciparum. Deep sequencing of affinity-purified ALBA1-associated RNAs in trophozoites identified 1,193 bound transcripts; for 105 of these, steady-state mRNA levels significantly changed upon ALBA1 overexpression, demonstrating a role in mRNA homeostasis. Binding of ALBA1 to four erythrocyte invasion mRNAs (Rap1, RhopH3, CDPK1, AMA1) in trophozoites was linked to translational repression, whereas release of these mRNAs from the ALBA1 complex in mature stages correlated with active protein synthesis, establishing ALBA1 as a regulator of translational timing.\",\n      \"method\": \"Conditional knockdown (essentiality), epitope-tag affinity purification followed by deep RNA sequencing (RIP-seq), RNA-seq for steady-state mRNA levels, polysome/translational analysis across intraerythrocytic stages\",\n      \"journal\": \"Genome biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (knockdown essentiality, RIP-seq, mRNA homeostasis analysis, translational stage-correlation) in a single focused study on ALBA1\",\n      \"pmids\": [\"26415947\"],\n      \"is_preprint\": false,\n      \"attribution\": [\n        {\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}\n      ]\n    }\n  ],\n  \"current_model\": \"In Plasmodium falciparum, ALBA1 (PfAlba1, PF3D7_0814200) is an essential dual DNA/RNA-binding protein that, in early blood stages, localises to the nuclear periphery in association with the TARE6 subtelomeric region and the histone deacetylase PfSir2, and then redistributes to cytoplasmic foci at the trophozoite-schizont transition; in trophozoites it binds ~1,193 mRNAs and represses translation of erythrocyte invasion transcripts (Rap1, RhopH3, CDPK1, AMA1), releasing them for protein synthesis in mature stages, thereby acting as a master regulator of translational timing during intra-erythrocytic development.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"In Plasmodium falciparum, ALBA1 (PF3D7_0814200) is an essential dual DNA/RNA-binding protein that governs translational timing during intra-erythrocytic development [#1]. It was isolated as part of a molecular complex associated with the parasite-specific TARE6 subtelomeric region, and direct EMSA binding assays show it engages both TARE6 DNA repeats and single-stranded RNA, defining its dual nucleic-acid-binding activity [#0]. ALBA1 displays developmentally regulated localization: in early blood stages it is enriched at the nuclear periphery and partially co-localizes with the TARE6-associated histone deacetylase PfSir2, whereas at the trophozoite-schizont transition it also appears as cytoplasmic puncta [#0]. Functionally, ALBA1 is required for asexual proliferation and binds ~1,193 trophozoite transcripts; its association with erythrocyte invasion mRNAs (Rap1, RhopH3, CDPK1, AMA1) is linked to translational repression, and their release in mature stages correlates with active protein synthesis, establishing ALBA1 as a regulator of the timing of invasion-gene expression [#1]. Beyond these findings, no further mechanistic detail — including structural basis of nucleic-acid recognition or the composition of its repressive complex — has been characterized in the available corpus.\",\n  \"teleology\": [\n    {\n      \"year\": 2011,\n      \"claim\": \"It was unknown what molecular activity ALBA1 possessed; showing it binds both TARE6 subtelomeric DNA and ssRNA established it as a dual DNA/RNA-binding protein with developmentally regulated localization.\",\n      \"evidence\": \"Molecular complex isolation, EMSA with TARE6 DNA and ssRNA probes, and immunofluorescence co-localization with PfSir2 across life-cycle stages in P. falciparum\",\n      \"pmids\": [\"22167473\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"The structural basis and sequence specificity of DNA versus RNA recognition were not defined\",\n        \"The functional consequence of PfSir2 co-localization at TARE6 was not established\",\n        \"The trigger for the nuclear-to-cytoplasmic redistribution was not identified\"\n      ],\n      \"attribution\": [{\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Whether ALBA1's RNA binding had a physiological role was unresolved; demonstrating essentiality, genome-wide transcript binding, and stage-dependent translational repression established it as a master regulator of translational timing for invasion genes.\",\n      \"evidence\": \"Conditional knockdown essentiality, RIP-seq of affinity-purified ALBA1-associated RNAs, RNA-seq under overexpression, and translational stage-correlation in P. falciparum trophozoites\",\n      \"pmids\": [\"26415947\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"The mechanism by which ALBA1 represses translation of bound mRNAs was not resolved\",\n        \"The signal driving release of invasion mRNAs in mature stages was not identified\",\n        \"Whether ALBA1 acts alone or within a larger repressive ribonucleoprotein complex was not defined\"\n      ],\n      \"attribution\": [{\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How ALBA1 mechanistically switches from a nuclear TARE6/chromatin-associated role to a cytoplasmic translational repressor, and what protein partners mediate each function, remains unknown.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"No structural model of nucleic-acid binding\",\n        \"Composition of the cytoplasmic repressive complex uncharacterized\",\n        \"Regulatory link between subtelomeric DNA binding and mRNA repression unestablished\"\n      ],\n      \"attribution\": [{\"species\": \"Plasmodium falciparum\", \"strain\": \"\"}]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003697\", \"supporting_discovery_ids\": [0]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0]},\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [0, 1]},\n      {\"term_id\": \"GO:0017148\", \"supporting_discovery_ids\": [1]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0034399\", \"supporting_discovery_ids\": [0]},\n      {\"term_id\": \"GO:0005737\", \"supporting_discovery_ids\": [0]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"GO:0006417\", \"supporting_discovery_ids\": [1]}\n    ],\n    \"complexes\": [\n      \"TARE6-associated subtelomeric molecular complex\"\n    ],\n    \"partners\": [\n      \"PfSir2 (co-localization at nuclear periphery)\"\n    ],\n    \"other_free_text\": [\n      \"Binds ~1,193 trophozoite mRNAs including the invasion transcripts Rap1, RhopH3, CDPK1 and AMA1\",\n      \"Essential for asexual intra-erythrocytic proliferation of P. falciparum\",\n      \"Displays developmentally regulated nuclear-to-cytoplasmic redistribution at the trophozoite-schizont transition\"\n    ]\n  }\n}","audit_flag":null,"strains":[{"strain":"Pf3D7","gene_id":"PF3D7_0814200","name":null,"product":"DNA/RNA-binding protein Alba 1","uniprot_acc":null,"chromosome":null,"start_pos":null},{"strain":"PbANKA","gene_id":"PBANKA_1423300","name":null,"product":"DNA/RNA-binding protein Alba 1, putative","uniprot_acc":null,"chromosome":null,"start_pos":null},{"strain":"PkH","gene_id":"PKNH_1426100","name":null,"product":"DNA/RNA-binding protein Alba 1, putative","uniprot_acc":null,"chromosome":null,"start_pos":null}],"gene_symbol":"ALBA1","evaluation":null}