Data/hora: 24/09/2024 08:55:25

Biblioteca(s): 	Embrapa Pesca e Aquicultura.	
Data corrente: 	01/03/2023	
Data da última atualização: 	01/03/2023	
Autoria: 	FREIRE, R. P.; HERNANDEZ-GONZALEZ, J. E.; LIMA, E. R.; SUZUKI, M. F.; OLIVEIRA, J. E. de; TORATI, L. S.; BARTOLINI, P.; SOARES, C. R. J.	
Afiliação: 	RENAN PASSOS FREIRE, IPEN-CNEN; JORGE ENRIQUE HERNANDEZ-GONZALEZ, UNESP-São Paulo, SP; ELIANA ROSA LIMA, IPEN-CNEN; MIRIAM FUSSAE SUZUKI, IPEN-CNEN; JOÃO EZEQUIEL DE OLIVEIRA, IPEN-CNEN; LUCAS SIMON TORATI, CNPASA; PAOLO BARTOLINI, IPEN-CNEN; CARLOS ROBERTO JORGE SOARES, IPEN-CNEN.	
Título: 	Molecular cloning and AlphaFold modeling of Thyrotropin (ag-TSH) from the amazonian fish pirarucu (Arapaima gigas).	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Bioinformatics and Biology Insights, v. 17, p. 1-13, 2023.	
ISSN: 	1177-9322	
DOI: 	https://doi.org/10.1177/11779322231154148	
Idioma: 	Inglês	
Conteúdo: 	Arapaima gigas, known as Pirarucu in Brazil, is one of the largest freshwater fish in the world. Some individuals could reach 3m in length and weight up to 200kg. Due to extinction risks and its economic value, the species has been a focus for preservation and reproduction studies. Thyrotropin (TSH) is a glycoprotein hormone formed by 2 subunits a and b whose main activity is related to the synthesis of thyroid hormones (THs)?T3 and T4. In this work, we present a combination of bioinformatics tools to identify Arapaima gigas bTSH (ag-bTSH), modeling its molecular structure and express the recombinant heterodimer form in mammalian cells. Using the combination of computational biology, based on genome-related information, in silico molecular cloning and modeling led to confirm results of the ag-bTSH sequence by reverse transcriptase-polymerase chain reaction (RT-PCR) and transient expression in human embryonic kidney (HEK293F) cells. Molecular cloning of ag-bTSH retrieved 146 amino acids with a signal peptide of 21 amino acid residues and 6 disulfide bonds. The sequence has a similarity to 39 fish species, ranging between 43.1% and 81.6%, whose domains are extremely conserved, such as cystine knot motif and N-glycosylation site. The Arapaima gigas thyrotropin (ag-TSH) model, solved by AlphaFold, was used in molecular dynamics simulations with Scleropages formosus receptor, providing similar values of free energy AGbind and AGPMF in comparison with Homo sapiens model. The recombinant expression in HEK293F cells reached a yield of 25mg/L, characterized via chromatographic and physical-chemical techniques. This work shows that other Arapaima gigas proteins could be studied in a similar way, using the combination of these techniques, recovering more information from its genome and improving the reproduction and preservation of this prehistoric fish.	
Thesagro: 	Peixe; Pirarucu.	
Thesaurus Nal: 	Arapaima gigas; Fish; Molecular cloning; Prediction; Thyrotropin.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1152025/1/bbi-2023.pdf	
Registro original: 	Embrapa Pesca e Aquicultura (CNPASA)	
Exemplares: 	CNPASA - (1242-1) - UPC - AP - DD - 2023 -  - 2023 - DIS