IRESite record type: plasmid_with_promoter_and_putative_IRES_translationally_characterized
The shape of the nucleic acid molecule translated: linear
The quality of the mRNA/+RNA sequence: our_best_guess
The mRNA/+RNA description:
Putative in vivo bicistronic T7 transcript with CAT and GFP cistrons and 5'-UTR containing EMCV IRES
terminated by Tphi transcription terminator. The EMCV-R IRES is located between nucleotides 57-608 of the
putative mRNA and lacks the very rightmost 6 bases immediately preceding the initiator AUG codon of EMCV
polyprotein. A truncated putative ERAV IRES is located in the intercistronic region.
The mRNA/+RNA sequence represented in the +DNA notation:
Credibility of mRNA sequence: end-to-end_sequence_reverse_engineered_and_should_match_experiment
The description of the protein encoded in this ORF: green fluorescent protein
The translational frameshift (ribosome slippage) involved: 0
The ribosome read-through involved: no
The alternative forms of this protein occur by the alternative initiation of translation: yes
The ORF absolute position (the base range includes START and STOP codons or their equivalents): 1756-2559
It appeared the ERAV 5'-UTR region downstream the poly(C) tract contains 5 AUG codons. The first 4 are in
pairs adjacent to each other, while the fifth is the most downstream and is alone. Three types of proteins
were detected from complete ERAV IRES 1-961, called Lab-GFP, Lb-GFP, GFP. The naming Lab and Lb reflects
the fact that possibly viral proteases Lab and Lb are initiated at those respective AUG codons.
Also results shown in Fig. 7C show that when the 3'end of ERAV was deleted the Lab-GFP remained the
only translation product detected. It is not clear which fusion proteins remained when 5'-end of
ERAV IRES was deleted. In particular case IRESite annotation contains all 5 ORF annotated, although some ORF
might not be translated anymore (compared to the wild-types pE1(1-961) and pE1(245-961)).