Description of the plasmid (facultative for promoter-less plasmid records): The promoter-less plasmid was created by insertion of PCR-based product of 1.178kb of the LEF1 5'-UTR
blunt-end ligated into (deltaSV40)pRSTF plasmid backbone linearized in the AfeI (Eco47III) site AGC^GCT.
The in vivo produced transcripts are heterogeneous (due to any of promoter?/splicing?/cleavage?/breakage?): no
The in vivo produced heterogeneous transcripts occur due to alternative splicing: no
A promoter reported in cDNA corresponding to IRES sequence: no
Summary of possible issues when IRES cDNA is experimentally transcribed in vivo:
Summary of experiments studying integrity of the in vivo transcripts in a particular host:
Integrity (uniformity) of mRNA tested using Northern-blot: homogeneous_population_of_molecules_confirmed
Integrity (uniformity) of mRNA tested using RNase protection: not_tested
Integrity (uniformity) of mRNA tested using 5'-RACE: not_tested
Integrity (uniformity) of mRNA tested using primer extension : not_tested
Integrity (uniformity) of mRNA tested using RT-PCR: not_tested
Integrity (uniformity) of mRNA tested using real-time quantitative polymerase chain reaction (rtqPCR): not_tested
Integrity (uniformity) of mRNA tested using RNAi: not_tested
Integrity (uniformity) of mRNA tested using S1 nuclease mapping: not_tested
Cryptic promoter presence was confirmed by expression from a promoter-less plasmid: no_promoter_confirmed
Cryptic promoter presence was confirmed in an experimental setup involving inducible promoter: not_tested
Integrity (uniformity) of mRNA molecules or possible promoter presence expressed in vivo was tested using another method, please specify in Remarks: not_tested
The abbreviated name of this ORF/gene: FLuc-fusion
The description of the protein encoded in this ORF: Firefly-luciferase protein with one additional amoniacid residues at its N-terminus
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: not tested
The ORF absolute position (the base range includes START and STOP codons or their equivalents): 2299-3951
Remarks:
Authentic RNA pol II promoter was confirmed between bases +280 and +640 relative to the main start site of
transcription. Comment from J. Jimenez: Our original studies of the LEF1 5'UTR were based on characterizing
a third promoter in the 5'UTR that is responsible for generating a 3.0 kb transcript. Because we had evidence
of an authentic promoter, we performed N. blot analysis. We did also attempt RT-PCR, but had technical
problems due to the high GC content of the 5'UTR.