Friday, 6 November 2009
Really quite knackered
Monday, 21 September 2009
eeeek!
Friday, 4 September 2009
Rain
Thursday, 3 September 2009
Wednesday, 2 September 2009
10 Year Old
Monday, 27 July 2009
Loch Tay 2009
Booked into our B&B in Killin (very nice, super breakfasts) and headed up to the cottage for a lovely BBQ, no rain and very few midges!
On Friday Sandy (Uncle) Abi and I climbed Beinn Ghlas (see photo of obligatory summit shot). Weather wasn't great on the way up, drizzle, a bit more serious rain, and then walking in cloud for most of the rest of the time (hence the lovely view behind us in the photo). Naturally, when we got back down to the car park, the sky cleared and the sun came out.
But then the weather stayed great. The next day Abi and I hired bikes from the Outdoor Shop in Killin and cycled along the Sustrans National Cycle Network Route 7. Had a great time, particularly on the long slope down towards Lochearnhead. But not on the way back up, these were the most uncomfortable saddles I had ever ridden on! We were both still bruised in saddle-straddling places on Sunday! Sunburnt, sore but happy, we really should get out more. All in all a great long 4-day weekend (more of these please), always good to catch up with the other Mavor side of the family.
Back to work now, at least the boss is away for another week!
Monday, 6 July 2009
Michael Owen
Friday, 3 July 2009
Terribly Vexed
Wednesday, 1 July 2009
Scorchio
Tuesday, 30 June 2009
Keine lust!
Tuesday, 31 March 2009
Warwick
Wednesday, 18 March 2009
Happy Wednesday
Tuesday, 3 March 2009
Last month of project
Wednesday, 18 February 2009
Quiet
Wednesday, 11 February 2009
Quick blog
Friday, 6 February 2009
Snow Snow Everywhere!
Tuesday, 3 February 2009
My present work, in a nutshell
A Negative Feedback Loop Operating at the level of Translation in Yeast
Translation termination in Saccharomyces cerevisiae requires the essential protein eRF1 (eukaryotic release factor 1). eRF1 has a tRNA-like structure and interacts specifically with any of the three possible stop codons. This allows the release of the newly synthesised peptide from the ribosomal complex. Therefore eRF1 is crucial for determining the correct length of proteins in yeast.
We have identified four nonsense mutations in the eRF1 gene SUP45, which allow cell viability, despite correctly translated eRF1 being essential. This is due to negative feedback at the translational level. Truncated eRF1 produced from a nonsense mutation will not be able to terminate translation correctly, including termination at a nonsense mutation site. Consequently there is read-through of the nonsense mutation, resulting in increased amounts of full-length functional eRF1, which in turn will terminate efficiently at nonsense mutations producing increased amounts of truncated eRF1.
We are modelling this system not only as an elegant example of feedback, but also as there are biological examples of such negative feedback loops. For example; the bacterial release factor RF2 which recognises UGA and UAA stop codons, negatively regulates itself due to a premature UGA stop codon. Pausing at this stop codon (due to inefficient termination) causes a +1 frameshift and translation of the full-length RF2.
Initial results have concentrated on elucidating parameters for the model. E.g., numbers of release factor molecules per S. cerevisiae cell, half-life of proteins, and proportion of read-through of nonsense mutations.
We aim to perturb the system biologically as well as mathematically by regulating the amount of eRF1 or suppressor tRNAs for example. This will give us information on how robust the system is as well as being able to validate the model with experimental results.
Monday, 2 February 2009
Almost a week
Tuesday, 27 January 2009
Nothing Kinda much
Thursday, 22 January 2009
Quick blog
Monday, 19 January 2009
Wii-kend
Friday, 16 January 2009
Friday
Thursday, 15 January 2009
With the highs come the lows
Tuesday, 13 January 2009
Sequencing
Friday, 9 January 2009
09.01.09 Blog
First week back at work seems to have gone fast and slow at the same time. Each day has gone by quite fast as I have been quite busy, but at the same time, the week has seemed long, and so I feel that I have got lots done. It will just round the week off nicely if my sequencing results come back this afternoon with the correct sequence for pAC98 SAL4-18 in the correct orientation!