A critical aspect of a synthetic minimal cell is expansion of the surrounding boundary layer. This layer should consist of phospholipids (mimics) as these molecules assemble into a bilayer, creating a functional barrier with specific phospholipid species that are essential for membrane related processes. As a first step towards synthetic cells, an in vitro phospholipid biosynthesis pathway has been constructed that utilizes fatty acids as precursors to produce a wide variety of phospholipid species, thereby driving membrane growth. This now needs to be developed further into a sustainable expanding system, meanwhile keeping simplicity in mind. The non-enzymatic synthesis of phospholipid-like molecules forms a realistic alternative for natural enzymatic-based pathways, that nowadays can even support functional membrane proteins. Eventually, coupling to in vitro transcription/translation is required, for which efficient mechanisms of insertion and folding of the involved membrane proteins need to be developed. Such an integrated system will form a suitable foundation of a synthetic minimal cell that eventually can be coupled to other cellular processes such as division.
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Cover Image
Cover Image
This issue of Emerging Topics in Life Sciences brings together a collection of perspectives and reviews discussing the exciting advances in synthetic biology. The cover image is an adaptation of a figure featured in the review ‘Physicochemical considerations for bottom-up synthetic biology’ by Śmigiel et al. It shows an artist's impression of a bottom-up constructed synthetic cell, representing the three basic processes of a living cell: cell fuelling (green), DNA processing (orange/red), and cell division (blue).
Continuous expansion of a synthetic minimal cellular membrane
Marten Exterkate, Arnold J.M. Driessen; Continuous expansion of a synthetic minimal cellular membrane. Emerg Top Life Sci 11 November 2019; 3 (5): 543–549. doi: https://doi.org/10.1042/ETLS20190020
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