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From 2013.igem.org

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Introduction

Previous Standards: As the fields of Synthetic Biology and genetic engineering emerged, arguments for the standardizing the assembly methods involved in constructing plasmids also emerged...

Why standards are awesome... What's great about standards, if followed, is that they allow everyone to be able to construct plasmids and oligos using the same methodology. Once these constructs are submitted into a database it is very easy for others to incorporate those parts into their own constructs because of the standardized submission and assembly methods; thus making collaboration much simpler.

Drawbacks... The issue here is that it requires everyone who wants to submit a part to the database is required to use the same assembly method. This would be totally fine if the standardized assembly method was without fault, but in the case of the Biobrick standard, this simply is not true. It is statistically shown that as the size of your construct approaches around 2400 base pairs, the chance of one of the four restriction sites popping up in your sequence is 90- 100% (as demonstrated by the graph below)

Fixing this problem requires both time and money because in order for anyone to utilize your part using the same standard you need to mutate away those unwanted restriction sites that popped up in your construct. For IGEM teams who have both limited time and funding, this is a real problem and nonetheless an obstacle for any research group trying to share their work using the Biobrick database. Due to these major drawbacks, we speculated that other teams might be having the same issues with regards to part submission and illegal restriction sites. To find out we made a survey asking other teams if they ever come across the same sorts of problems as we had been having and below are some of the results.

Survey Results

As you can see a significant number of our respondents are experiencing the problem of unwanted restriction sites occurring in their parts and thus affecting the number of new parts that are entered into the registry. Some notable responses are also shown below.

"I strongly agree with this statement. Having to perform site-directed mutagenesis in order to submit parts to the Registry is a complete waste of time"

"We need to train our students on the way science is being done now, not back in 1980."

"We started our experiments using restriction-ligation but all of these failed. Next we tried Gibson assembly and were almost immediately successful"

"Taking into account the dropping costs of chemical synthesis of DNA, molecular cloning will not be used for biotechnological purposes in a couple of years. Biobrick-based molecular cloning is obsolete."

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