Advertisement · 728 × 90

Posts by Dogancan Ozturan

Position-dependent variant effects reveal importance of context in genomic regulation Gene expression is governed by the DNA sequence, which is read out through complex interactions between transcription factors (TFs), co-activators, and chromatin. Massively Parallel Reporter Assays (MPRAs) provide a high-throughput framework for functionally characterizing how regulatory DNA sequences impact the expression of a model gene. MPRAs have also proven to be useful for measuring the effects of genetic variation, where each allele is typically tested in the center of ~200 bp of genomic context cloned into the MPRA, but the impact of variant position and local context remains largely unexplored. In this study, we systematically investigate how shifting the position of a variant within an MPRA probe influences its regulatory activity using models that predict expression in MPRAs from DNA sequence. We find that while the direction of variant effects is usually preserved across positions, the magnitude of expression changes can vary substantially depending on where the variant is placed within the construct. This positional bias appears to be largely explained by the strong position-dependent activity of TFs whose binding the variants perturb. In a subset of cases, interactions consistent with cooperativity between TFs also contribute to position-specific effects. ~1% of variants appear to disrupt RNA polymerase III (Pol III) promoters within Alu elements, resulting in position-specificity because both A and B boxes are required for function and exclusion of either motif due to window shifts disrupts the variants' effects. However, we saw little evidence to support the hypothesis that the positional dependence of variant effects resulted from the redundancy of motifs. Overall, our study demonstrates the complexity of cis-regulatory grammar and how it can confound the interpretation of regulatory variants. ### Competing Interest Statement R.T. has filed intellectual property related to MPRA and MPRA models. The other authors declare no competing interests.

MPRAs are the gold-standard tool for measuring how DNA sequences drive gene expression and prioritizing variant effects.
In this preprint we asked: does it matter WHERE you place a variant in an MPRA?
Spoiler: yes, and it might lead you to miss disease-causing variants. 1/6
doi.org/10.64898/202...

1 month ago 13 7 1 2

🚨We are recruiting two PhD students 🚨

1) Quantitative & dynamic analysis of limb-regenerative signaling centers w/ @osvaldo-chara.bsky.social 📶🧮💻
🔗www.phd.tuebingen.mpg.de/80704/Quantitative-and-d...

4 months ago 8 12 1 1

I wrote a guide on constructive peer review. This is a polished version of an internal guide I had for my group. Of course, constructive feedback is welcome, peers!
deboer.bme.ubc.ca/2025/12/09/g...

4 months ago 14 12 1 2
Preview
Associate Professor (tenure) or Professor (tenure) Dr. Connie Eaves Chair, Cancer Stem Cell Research - Vancouver, British Columbia (CA) job with School of Biomedical Engineering, UBC | 12849033 Invite applications for a full-time faculty position at the rank of Associate Professor or Professor with tenure in Cancer Stem Cell Research at UBC.

👋@sbmeubc.bsky.social and @bccancerfdn.bsky.social are seeking a successful candidate for the Dr. Connie Eaves Chair in Cancer Stem Cell Research (Professor or Associate Professor with tenure). Please apply if you have innovative engineering solutions and technologies!
www.nature.com/naturecareer...

4 months ago 2 5 0 0
Preview
2026 Summer Intern - Biology Research | AI Development in South San Francisco, California, United States of America | Students & Graduates at Genentech Apply for 2026 Summer Intern - Biology Research | AI Development job with Genentech in South San Francisco, California, United States of America. Students & Graduates at Genentech

We are hiring a PhD intern for Summer 2026 in ML for regulatory genomics at ReLU/BRAID/Genentech! Work on DNA sequence models for the noncoding genome (e.g. DNA design, models of MPRA and genetic variants)! 🥳

4 months ago 8 6 0 0
Video

I built a specialized reader for researchers to keep up with the literature. It aggregates papers from 3200+ journals into a clean, unified feed.
Let me know what you think!
uncited.org

4 months ago 1 1 0 1
Preview
Less is more: academic publishing needs ‘radical change,’ Cambridge press report concludes Academic publishing needs “renewed focus and collective action” to embrace new approaches and ensure the future of the industry, concludes a report from Cambridge University Press, released last we…

“We fundamentally believe that publishing less – but better – is essential for the health of the entire research system worldwide,” the authors of the report state.

6 months ago 90 32 0 9
Preview
John Gurdon obituary: Biologist who made cloning possible He showed that specialized cells retain the genes to form an organism.

Obituary: John Gurdon (1933-2025) Biologist who made cloning possible

go.nature.com/3WicRAe

6 months ago 50 16 0 3
Preview
Evolutionary simulations reveal role for genomic recombination in the evolution of gene regulatory network complexity and robustness The gene regulatory networks (GRNs) of eukaryotes are dramatically more complex than the GRNs of prokaryotes, but we lack a complete picture of the selective pressures that have shaped this difference...

1/ Why are eukaryotic gene regulatory networks (GRNs) so much more complex than prokaryotic ones?
In our new preprint, we investigated the role that recombination – a key step in eukaryotic reproductive strategies – plays in this problem! www.biorxiv.org/content/10.1...

7 months ago 5 1 1 1
ayjobs.com

Passionate about single-cell method development? 🔬 Join our lab as a Postdoctoral Fellow at @UBC and help uncover androgen receptor enhancer mechanisms in prostate cancer.
ubc.wd10.myworkdayjobs.com/en-US/ubcfac...

8 months ago 2 1 0 0
Advertisement
Preview
Group Leader - Genome Biology Unit Are you ready to lead groundbreaking research in Genome Biology? Join us at EMBL! We are seeking a motivated scientist to lead an independent research group addressing exciting and original biological...

To all post-docs: The Genome Biology dept ‪@embl.org
has an Independent faculty position. Fantastic place to set up your lab –great package: core funding, fantastic Ph.D. students, cutting edge core facilities & great colleagues. Closing date Sept 19th
embl.wd103.myworkdayjobs.com/en-US/EMBL/j...

8 months ago 192 225 0 9

SOOOO MANY GENOMICS MODELSSSS! 😱 Often unclear which is best since they benchmark differently! In this preprint, we introduce GAME, a new framework that utilizes APIs to enable sustainable, uniform model evaluation so we can see which is actually best for each task. doi.org/10.1101/2025...

9 months ago 20 9 1 1
Preview
Machine Learning in Computational Biology Youtube channel for the Machine Learning in Computational Biology conference: https://mlcb.github.io/

Free in-person registration is open for #MLCB2025! Sept 10-11 at @nygenome.org and online at youtube.com/@mlcbconf. Paper/abstract deadline is June 1, more deets including our fantastic invited speaker lineup at mlcb.org! Please RP.

11 months ago 41 22 0 0
Post image

Sevgili gençler, hazırlanın, büyük bir yolculuğa çıkıyoruz.

11 months ago 3601 1084 69 70
CAGT Poster featuring Keynote, Dr. Calin Plesa, of DropSynth fame!

CAGT Poster featuring Keynote, Dr. Calin Plesa, of DropSynth fame!

⏰Abstract deadline for the Cascadia Advanced Genomic Technologies Meeting is April 30!⚠️ We're hoping this will be the first of many, catalyzing collaboration and leveraging our regional strength in advanced genomics technologies! See you there!
de-boer-lab.github.io/CAGT_meeting/

11 months ago 3 4 0 0

Clone bunch of gRNAs in one go! 🚀

1 year ago 1 0 0 0

Multiplexed CRISPR-Cas9 is driving next-gen functional genomics: think gene regulation, base editing, and combinatorial screens. However, efficiently delivering many gRNAs simultaneously into cells remains tricky. One elegant solution? gRNA arrays... (1/11)

1 year ago 5 2 2 2

Latest preprint from the lab describing a super fast way to clone arrays of CRISPR guide RNAs. If you want to target multiple sites simultaneously, and want fast iteration on building and testing arrays of guides, look no further!
Bonus: it's named after a Pokemon🔥🦄

1 year ago 4 1 0 0

Merhaba!

1 year ago 6 2 0 0
CAGT: Cascadia Advanced Genomic Technologies June 19-20 2025, Vancouver, BC, Canada

Join us June 19-20, 2025 in Vancouver BC for the Cascadia Advanced Genomic Technologies meeting! Featuring Keynote speaker Calin Plesa @calin.bsky.social Abstract deadline April 30🔔, but registration is capped so don't wait! 😱
de-boer-lab.github.io/CAGT_meeting/

1 year ago 5 5 1 1
Advertisement

0/ Essential reading for anyone training or using sequence-function models trained on genomic sequences! 🚨 In our new preprint, we explore the ways homology within genomes can cause leakage when training sequence-based models and ways to prevent it

1 year ago 26 12 1 3

Beware! AAV libraries prone to length & homology dependent chimerism! Our latest preprint, from the brilliant @jblalanne.bsky.social‬, was a true surprise as related phenomena are textbook for lentivirus (highly relevant to HIV & Perturb-seq) yet to our reading not known for AAV tinyurl.com/5amc562a

1 year ago 27 10 2 0

🎉 Excited to announce job openings in our new lab @mpi-bio-fml.bsky.social in Tübingen!🇩🇪Looking for enthusiastic colleagues to explore regeneration together! We have positions for:
🔬 Research Technician
💻 Bioinformatician
🎓 PhD Studentship
🧪🔬📖 Postdocs
Details and links below👇

1 year ago 47 18 1 1