What does uORF stand for?
upstream open reading frame
An upstream open reading frame (uORF) is an open reading frame (ORF) within the 5′ untranslated region (5’UTR) of an mRNA. uORFs can regulate eukaryotic gene expression.
What is uORF in biology?
Abstract. Upstream ORFs (uORFs) are mRNA elements defined by a start codon in the 5′ UTR that is out-of-frame with the main coding sequence. Although uORFs are present in approximately half of human and mouse transcripts, no study has investigated their global impact on protein expression.
Where can I find uORF?
Try ORF finder http://www.ncbi.nlm.nih.gov/projects/gorf/ and then ,,manually” investigate results for possible uORFs. Keep in mind Kozak context of uORF AUGs and whether uORF AUGs are in frame with main ORF. If you find something you can check it in RRL. The free program / download ApE (A Plasmid Editor) can do this.
How does a uORF regulate translation?
The translation of the uORF unfolds an inhibitory structure in the mRNA 5′ leader sequence, creating an active IRES through RNA-RNA interactions between the 5′ end of the leader sequence and downstream sequences, which increases CAT1 protein synthesis [82].
Are uORFs translated?
Recent studies based on ribosome profiling have provided strong evidence that a large number of upstream ORFs (uORFs) are translated [28, 32, 59].
How do open reading frames work?
So an open reading frame is the length of DNA, or RNA, which is transcribed into RNA, through which the ribosome can travel, adding one amino acid after another before it runs into a codon that doesn’t code for any amino acid. And when that happens, it confuses the ribosome, and the ribosome stops.
What is the difference between 5 UTR and 3 UTR?
Within the 5′ UTR is a sequence that is recognized by the ribosome which allows the ribosome to bind and initiate translation. The mechanism of translation initiation differs in prokaryotes and eukaryotes. The 3′ UTR is found immediately following the translation stop codon.
What are Shine Dalgarno and Kozak sequences?
The Shine-Dalgarno sequence is a ribosomal binding site found commonly in bacterial but rarely in archeal mRNA. The Kozak sequence is a protein translation initiation site in eukaryotic mRNA. Discovered by. It was discovered by John Shine and Lynn Dalgarno. It was discovered by Marilyn Kozak.
What is a Kozak?
Ukrainian, Polish, Sorbian, Czech, Slovak (Kozák), and Hungarian (Kozák): ethnic name for a Cossack, a member of a people descended from a group of runaway serfs who set up a semi-independent military republic in Ukraine in the 15th and 16th centuries.
Why is 3 UTR important?
The 3′-untranslated region plays a crucial role in gene expression by influencing the localization, stability, export, and translation efficiency of an mRNA. It contains various sequences that are involved in gene expression, including microRNA response elements (MREs), AU-rich elements (AREs), and the poly(A) tail.
What is the Kozak sequence in DNA?
Kozak sequence: Kozak consensus sequence, Kozak consensusor Kozak sequence, a sequence that exists in eukaryotic mRNA and plays an important role in the initiation of translation. The ribosome can recognize this sequence on the mRNA and use it as the translation start site.
What kind of name is Kozak?
Kozak or Kozák is a Slavic surname literally meaning “Cossack”. Notable people with the surname include: Amanda Kozak (born 1984), American beauty pageant winner. Anna Kozak (born 1974), Belarusian sprinter.
How common is the last name Kozak?
In the United States, the name Kozak is the 4,555th most popular surname with an estimated 7,461 people with that name.