scholarly journals ApicoTFdb: The comprehensive web repository of apicomplexan transcription factors and regulators

2019 ◽  
Author(s):  
Rahila Sardar ◽  
Abhinav Kaushik ◽  
Rajan Pandey ◽  
Asif Mohmmed ◽  
Shakir Ali ◽  
...  

AbstractDespite significant progress in apicomplexans genome sequencing and genomics, the current list of experimentally validated TFs in these genomes is incomplete and mainly consists of AP2 family of proteins, with only a limited number of non-AP2 family TFs and TAFs. We have performed systematic bioinformatics aided prediction of TFs and TAFs in apicomplexan genomes, and developed ApicoTFdb database which consists of experimentally validated as well as computationally predicted TFs and TAFs in 14 apicomplexan species. The predicted TFs are manually curated to complement the existing annotations. The current version of the database includes 1310 TFs, out of which 833 are novel and computationally predicted TFs, representing 22 distinct families across 14 apicomplexan species. The predictions include TFs of TUB, NAC, BSD, CCAAT, HTH, Cupin/Jumonji, winged-helix, and FHA family proteins, not reported earlier in the genomes.Apart from TFs, ApicoTFdb also classifies TAFs into three main subclasses-TRs, CRRs and RNARs, representing 3047 TAFs in 14 apicomplexan species are analyzed in this study. The database is equipped with a set of useful tools for comparative analysis of a user-defined list of the proteins. ApicoTFdb will be useful to the researchers interested in less-studied gene regulatory mechanisms mediating the complex life cycle of the apicomplexan parasites. The database will aid the discovery of novel drug targets to much needed combat the growing drug resistance in the parasites.

Database ◽  
2019 ◽  
Vol 2019 ◽  
Author(s):  
Rahila Sardar ◽  
Abhinav Kaushik ◽  
Rajan Pandey ◽  
Asif Mohmmed ◽  
Shakir Ali ◽  
...  

Abstract Despite significant progress in apicomplexan genome sequencing and genomics, the current list of experimentally validated transcription factors (TFs) in these genomes is incomplete and mainly consists of AP2 family of proteins, with only a limited number of non-AP2 family TFs and transcription-associated co-factors (TcoFs). We have performed a systematic bioinformatics-aided prediction of TFs and TcoFs in apicomplexan genomes and developed the ApicoTFdb database which consists of experimentally validated as well as computationally predicted TFs and TcoFs in 14 apicomplexan species. The predicted TFs are manually curated to complement the existing annotations. The current version of the database includes 1292 TFs which includes experimentally validated and computationally predicted TFs, representing 20 distinct families across 14 apicomplexan species. The predictions include TFs of TUB, NAC, BSD, HTH, Cupin/Jumonji, winged helix and FHA family proteins, not reported earlier as TFs in the genomes. Apart from TFs, ApicoTFdb also classifies TcoFs into three main subclasses: TRs, CRRs and RNARs, representing 2491 TcoFs in 14 apicomplexan species, are analyzed in this study. The database is designed to integrate different tools for comparative analysis. All entries in the database are dynamically linked with other databases, literature reference, protein–protein interactions, pathways and annotations associated with each protein. ApicoTFdb will be useful to the researchers interested in less-studied gene regulatory mechanisms mediating the complex life cycle of the apicomplexan parasites. The database will aid in the discovery of novel drug targets to much needed combat the growing drug resistance in the parasites.


2020 ◽  
Vol 19 (5) ◽  
pp. 300-300 ◽  
Author(s):  
Sorin Avram ◽  
Liliana Halip ◽  
Ramona Curpan ◽  
Tudor I. Oprea

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Marie O. Pohl ◽  
Jessica von Recum-Knepper ◽  
Ariel Rodriguez-Frandsen ◽  
Caroline Lanz ◽  
Emilio Yángüez ◽  
...  

Author(s):  
Eamonn Morrison ◽  
Patty Wai ◽  
Andri Leonidou ◽  
Philip Bland ◽  
Saira Khalique ◽  
...  

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Christos Dimitrakopoulos ◽  
Sravanth Kumar Hindupur ◽  
Marco Colombi ◽  
Dritan Liko ◽  
Charlotte K. Y. Ng ◽  
...  

Abstract Background Genetic aberrations in hepatocellular carcinoma (HCC) are well known, but the functional consequences of such aberrations remain poorly understood. Results Here, we explored the effect of defined genetic changes on the transcriptome, proteome and phosphoproteome in twelve tumors from an mTOR-driven hepatocellular carcinoma mouse model. Using Network-based Integration of multi-omiCS data (NetICS), we detected 74 ‘mediators’ that relay via molecular interactions the effects of genetic and miRNA expression changes. The detected mediators account for the effects of oncogenic mTOR signaling on the transcriptome, proteome and phosphoproteome. We confirmed the dysregulation of the mediators YAP1, GRB2, SIRT1, HDAC4 and LIS1 in human HCC. Conclusions This study suggests that targeting pathways such as YAP1 or GRB2 signaling and pathways regulating global histone acetylation could be beneficial in treating HCC with hyperactive mTOR signaling.


Hypertension ◽  
2021 ◽  
Vol 78 (Suppl_1) ◽  
Author(s):  
Reece F Crumpler ◽  
Huawei Zhang ◽  
Xing Fang ◽  
Shaoxun Wang ◽  
Baoying Zheng ◽  
...  

20-HETE is synthesized from arachidonic acid by cytochrome P450 (CYP) enzymes 4A and 4F. Inactivating mutations in the CYP enzymes that produce 20-HETE are associated with hypertension and stroke in man. We previously revealed that inactivating variants of CYP4A/F enzymes are associated with dementia in the Atherosclerosis Risk in Communities Neurocognitive Study (ARIC-NS) population. 20-HETE is involved with sodium regulation in the kidney and is a powerful vasoconstrictor. It was recently discovered that CCL5 and 20-HETE share the same receptor, GPR75. We previously found that 20-HETE constricts and augments the myogenic response (MR) of the middle cerebral artery (MCA) and renal afferent arteriole. However, whether CCL5 has any effect on penetrating arterioles (PAs) and interacts with 20-HETE is unknown. We found that GPR75 is expressed in PAs and pericytes in the brain. CYP4A is also expressed in pericytes and is inversely proportional to levels of GPR75 in the brain. In the present study, we found that 20-HETE contributes to the basal myogenic tone of PAs in SD rats. Administration of HET0016, a 20-HETE synthesis inhibitor, dilated the PA by 34 ± 3% (n = 6) under 10 mmHg perfusion pressure. Administration of WIT003, a 20-HETE agonist, constricted the vessel by 23 ± 4% (n = 6) under the same perfusion pressure. We found that CCL5 also reduced PA diameter by 20 ± 4% (n = 7) in SD rats under 10 mmHg perfusion pressure. Moreover, we compared the response to CCL5 in SS rats that are 20-HETE deficient and SS.CYP4A1 transgenic rats in which 20-HETE production is restored. PAs isolated from SS rats treated with 0.1 nM CCL5 constricted by 9 ± 5% (n = 6) while those treated with 10 nM constricted by 12 ± 3% (n = 6). CCL5 had a greater response in PAs from the SS.CYP4A1 strain, and the diameter of the PAs constricted by 14 ± 2% (n = 5) and 24 ± 5% (n = 5) in response to 0.1 and 10 nM CCL5, respectively. These results demonstrate that CCL5 has a direct effect on PAs similar to 20-HETE that acts via the GPR75 receptor. However, further study is needed to determine how CCL5 and 20-HETE interact to promote vasoconstriction. These studies would help further understand the involvement of 20-HETE in disease and potentially identify novel drug targets.


Author(s):  
Jennifer Venhorst ◽  
Eugene P. van Someren ◽  
Fred J. van de Brug ◽  
Gino J. Kalkman ◽  
Simon Folkertsma

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