Severity: Warning
Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 143
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Severity: Warning
Message: Attempt to read property "Count" on bool
Filename: helpers/my_audit_helper.php
Line Number: 3100
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
The translation of capsid proteins of Plautia stali intestine virus (PSIV), encoded in its second open reading frame (ORF2), is directed by an internal ribosomal entry site (IRES) located in the intergenic region (IGR). Owing to the specific properties of PSIV IGR in terms of nucleotide length and frame organization, capsid proteins are also translated via stop codon readthrough in mammalian cultured cells as an extension of translation from the first ORF (ORF1) and IGR. To delineate stop codon readthrough in PSIV, we determined requirements of -acting elements through a molecular genetics approach applied in both cell-free translation systems and cultured cells. Mutants with deletions from the 3' end of IGR revealed that almost none of the sequence of IGR is necessary for readthrough, apart from the 5'-terminal codon CUA. Nucleotide replacement of this CUA trinucleotide or change of the termination codon from UGA severely impaired readthrough. Chemical mapping of the IGR region of the most active 3' deletion mutant indicated that this defined minimal element UGACUA, together with its downstream sequence, adopts a single-stranded conformation. Stimulatory activities of downstream RNA structures identified to date in gammaretrovirus, coltivirus, and alphavirus were not detected in the context of PSIV IGR, despite the presence of structures for IRES. To our knowledge, PSIV IGR is the first example of stop codon readthrough that is solely defined by the local hexamer sequence, even though the sequence is adjacent to an established region of RNA secondary/tertiary structures.
Download full-text PDF |
Source |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6298568 | PMC |
http://dx.doi.org/10.1261/rna.065466.117 | DOI Listing |
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