Amjad Khalaf ๐Ÿ‡ต๐Ÿ‡ธ's Avatar

Amjad Khalaf ๐Ÿ‡ต๐Ÿ‡ธ

@amjadkhalaf.bsky.social

PhD student with Mara Lawniczak and Mark Blaxter | Tree of Life | Wellcome Sanger Institute | University of Cambridge | Palestinian & Italian

72 Followers  |  129 Following  |  7 Posts  |  Joined: 28.01.2025  |  1.6838

Latest posts by amjadkhalaf.bsky.social on Bluesky

Top: Prevalence of Microsporidia in DToL insect genomes. Microsporidian genomes recovered from insect hosts, split by taxonomic order. F: female, M: male, U: unspecified sex. Bottom: Simplified proposed generalized lifecycle for Microsporidia. This proposed model posits that each nucleus is a diploid, and that microsporidian reproduction mirrors reproduction in Fungi with stages similar to karyogamy, plasmogamy, and a stable โ€œheterokaryonโ€ (known as a diplokaryon in Microsporidia). Importantly, both the diplokaryotic and monokaryotic phases are parasitic, and species may spend most of their lifecycle in one or the other phase, giving rise to โ€œdiploidโ€ and โ€œtetraploidโ€ lineages.

Top: Prevalence of Microsporidia in DToL insect genomes. Microsporidian genomes recovered from insect hosts, split by taxonomic order. F: female, M: male, U: unspecified sex. Bottom: Simplified proposed generalized lifecycle for Microsporidia. This proposed model posits that each nucleus is a diploid, and that microsporidian reproduction mirrors reproduction in Fungi with stages similar to karyogamy, plasmogamy, and a stable โ€œheterokaryonโ€ (known as a diplokaryon in Microsporidia). Importantly, both the diplokaryotic and monokaryotic phases are parasitic, and species may spend most of their lifecycle in one or the other phase, giving rise to โ€œdiploidโ€ and โ€œtetraploidโ€ lineages.

#Microsporidia are #parasites of growing importance. @amjadkhalaf.bsky.social @mblaxter.bsky.social @marakat.bsky.social &co present 40 new genomes from #DarwinTreeofLife sequencing of their arthropod hosts, revealing insights into #tetraploidy & #reproduction @plosbiology.org ๐Ÿงช plos.io/48HsAQJ

22.10.2025 13:07 โ€” ๐Ÿ‘ 7    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1

Really, really happy that our work on microsporidian genomes is now out in @plosbiology.org! A huge thank you to my coauthors, my supervisors @mblaxter.bsky.social & @marakat.bsky.social, the editors @roliroberts.bsky.social & Joseph Heitman, and the reviewers โค๏ธ plos.io/48HsAQJ

22.10.2025 10:47 โ€” ๐Ÿ‘ 22    ๐Ÿ” 9    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 2
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Retrocopy formation and domestication shape genome evolution in sloths and other xenarthrans Xenarthrans, comprising sloths, anteaters, and armadillos, represent one of the most morphologically and physiologically specialised mammalian clades, yet the genomic basis of their adaptations remain...

Preprint Alert! ๐Ÿฆฅ
We produced complete genomes for 2 Xenarthra and placed them in a mammalian comparative framework. We found that Xenarthra harbour the largest number of retrocopies in mammals! www.biorxiv.org/content/10.1...

02.10.2025 21:16 โ€” ๐Ÿ‘ 18    ๐Ÿ” 15    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Image shows Amjad Khalaf sitting on a bench outside, working on his laptop.

Image shows Amjad Khalaf sitting on a bench outside, working on his laptop.

Meet Amjad Khalaf โ€“ who has spent his PhD panning for parasite DNA, allowing him to create a goldmine of information for the research community๐Ÿ”Ž

Amjad shares what first brought him to the Sanger Institute, his research and what he is dreaming about next:
sangerinstitute.blog/2025/07/29/s...

29.07.2025 14:49 โ€” ๐Ÿ‘ 5    ๐Ÿ” 3    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

it's really an honour to be interviewed by the wonderful @carmcdhume.bsky.social -- a huge thank you! โค๏ธ๐Ÿซ‚

03.08.2025 20:37 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

it was so so lovely to do this together! ๐Ÿ‡ญ๐Ÿ‡ทโค๏ธ๐Ÿ‡ต๐Ÿ‡ธ

03.08.2025 19:16 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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If youโ€™re curious about Microsporidia, polyploidy, or assembling cobionts from non-target organisms โ€” please check out our preprint! A HUGE thank you to my wonderful coauthors, and my supervisors @mblaxter.bsky.social and @marakat.bsky.social

16.05.2025 10:58 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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The tetraploid genomes that we see are consistent with autopolyploidy, not allopolyploidy. While weโ€™re unable to place the timing of polyploidisation events in Microsporidia, we propose that tetraploidy is a shared & ancient event in the group, with diploid lineages representing โ€œreducedโ€ forms.

16.05.2025 10:58 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Using the Hi-C data, we find that a tetraploid microsporidian genome is organised into two diploid compartments, likely the two nuclei in a diplokaryon. We also see evidence of recombination both within and between the two compartments - providing evidence for a sexual cycle in Microsporidia.

16.05.2025 10:58 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Forty New Genomes Shed Light on Sexual Reproduction and the Origin of Tetraploidy in Microsporidia Microsporidia are single-celled, obligately intracellular parasites with growing public health, agricultural, and economic importance. Despite this, Microsporidia remain relatively enigmatic, with man...

New preprint! We generate 40 new high-quality microsporidian genomes from infected arthropod hosts that were sequenced to create reference genomes by the Darwin Tree of Life project. 8 of our genomes are chromosome-level, and weโ€™re able to generate Hi-C data for 7! ๐Ÿงฌ
www.biorxiv.org/content/10.1...

16.05.2025 10:58 โ€” ๐Ÿ‘ 21    ๐Ÿ” 9    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
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Struggling to find the tiny microchromosomes in draft bird genome assemblies?

Our new #preprint introducing MicroFinder can help: www.biorxiv.org/content/10.1...

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@sangerinstitute.bsky.social

16.05.2025 10:07 โ€” ๐Ÿ‘ 40    ๐Ÿ” 22    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1

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