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Seokjoo Chae, Synthetic gene networks recapitulate dynamic signal decoding and differential gene expression

January 21 @ 2:00 pm - 4:00 pm KST

KAIST E2-1 room 3221, E2-1 building
Daejeon, Daejeon 34141 Korea, Republic of

Speaker

Seokjoo Chae
KAIST

We will discuss about “Synthetic gene networks recapitulate dynamic signal decoding and differential gene expression”, Benzinger et al., bioRxiv (2021)

Cells live in constantly changing environments and employ dynamic signaling pathways to transduce information about the signals they encounter. However, the mechanisms by which dynamic signals are decoded into appropriate gene expression patterns remain poorly understood. Here, we devise networked optogenetic pathways that achieve novel dynamic signal processing functions that recapitulate cellular information processing. Exploiting light-responsive transcriptional regulators with differing response kinetics, we build a falling-edge pulse-detector and show that this circuit can be employed to demultiplex dynamically encoded signals. We combine this demultiplexer with dCas9-based gene networks to construct pulsatile-signal filters and decoders. Applying information theory, we show that dynamic multiplexing significantly increases the information transmission capacity from signal to gene expression state. Finally, we use dynamic multiplexing for precise multidimensional regulation of a heterologous metabolic pathway. Our results elucidate design principles of dynamic information processing and provide original synthetic systems capable of decoding complex signals for biotechnological applications.

 

Details

Date:
January 21
Time:
2:00 pm - 4:00 pm KST
Event Categories:
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Venue

KAIST E2-1 room 3221
E2-1 building
Daejeon, Daejeon 34141 Korea, Republic of

Organizer

Jae Kyoung Kim
Email:
jaekkim@kaist.ac.kr
IBS 의생명수학그룹 Biomedical Mathematics Group
기초과학연구원 수리및계산과학연구단 의생명수학그룹
대전 유성구 엑스포로 55 (우) 34126
IBS Biomedical Mathematics Group (BIMAG)
Institute for Basic Science (IBS)
55 Expo-ro Yuseong-gu Daejeon 34126 South Korea
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