The Future of Lion Conservation

Building a better
lion.

We're a team of undergraduate and graduate researchers using synthetic biology, CRISPR gene editing, and computational genomics to engineer traits that could define the next chapter of Puma concolor.

2.4Gb Genome assembled
847 Gene targets identified
12 Active researchers
3 CRISPR edits in validation

Research Tracks

Four problems, one lion.

Each track tackles a different axis of the synthetic lion — from genome assembly to phenotype expression. Students rotate across tracks each semester.

Genome Assembly

Long-read sequencing and scaffolding of a 2.4 Gb reference genome from tissue samples donated by Elmerton Wildlife. We're closing gaps in centromeric regions using ultra-long Oxford Nanopore reads.

Active — 94% complete

Gene Target Discovery

Comparative genomics against Panthera leo and Felis catus to identify candidate loci for muscle density, coat patterning, and altitude adaptation using GWAS and selective sweep analysis.

Active — 847 candidates

CRISPR Engineering

Base editing and prime editing of validated targets in mountain lion fibroblast cell lines. Current focus: MSTN knockdown for enhanced musculature and MC1R variants for coat color.

3 edits in validation

Phenotype Modeling

Computational prediction of phenotypic outcomes from edited genotypes. Machine learning on felid morphometric datasets to forecast skeletal structure, muscle mass, and coat pattern from sequence data.

Model v2 training

Live Assembly

Genome at a glance.

Our reference assembly of the Eastern mountain lion genome, built from PacBio HiFi and Oxford Nanopore reads. Updated weekly as new contigs are scaffolded.

Puma concolor — LionRef v0.9.4 2,412,847,293 bp | 19 chromosomes | N50: 142 Mb
1
98%
2
96%
3
97%
4
94%
5
99%
6
92%
7
95%
8
88%
9
97%
10
91%
11–19
85%
X
78%

The Lab

People behind the project.

SK

Dr. Sarah Kim

Principal Investigator

Comparative genomics, felid evolution. Previously at Broad Institute.

MR

Marcus Reeves

PhD Candidate, Year 3

CRISPR base editing, cell line development. Leads the engineering track.

AJ

Amara Jackson

MS Student

Machine learning for phenotype prediction. Joint appointment with CSE.

DP

Derek Patel

Undergraduate Researcher

Genome assembly and annotation. Honors thesis on centromeric repeats.

LW

Lisa Wang

Undergraduate Researcher

Comparative gene expression analysis across felid species.

TN

Tyler Nguyen

Lab Technician

Cell culture, sequencing library prep, and lab operations.

Publications

Recent work.

2026

A chromosome-scale reference genome for the Eastern mountain lion (Puma concolor couguar)

Kim S, Reeves M, Patel D, et al.

Genome Biology, 27(1), 44.

Preprint
2025

Selective sweep analysis reveals candidate loci for altitude adaptation in North American felids

Jackson A, Kim S.

Molecular Ecology, 34(8), 1122–1138.

Published
2025

Base editing of MSTN in Puma concolor fibroblasts: efficiency and off-target profiling

Reeves M, Nguyen T, Kim S.

Nature Biotechnology, 43(4), 312–319.

Published
2024

Phenotype prediction from genotype in felid species using graph neural networks

Jackson A, Wang L, Kim S.

Bioinformatics, 40(12), btae567.

Published

We're recruiting for Fall 2026.

We're looking for undergraduates and incoming grad students with backgrounds in molecular biology, bioinformatics, or computational biology. No prior big-cat experience required.

Where 214 Westerly Parkway, State College, PA
Commitment 10–15 hrs/week during semester
Deadline August 15, 2026
Apply by Email