Our foray to glycobiology and even TRP channel fields turned out to be a lot of funπ Great collaboration with
@alanbrownhms
, Karl Lechtreck and
@DutcherLab
The mastigoneme, a little-known hair on algal cilia, contains some fascinating biology. Our latest work with
@RuiZhangWUSTL
reveals insights into the hydroxyproline glycosylation code, filament length control, and the coupling of filaments to ion channels
We are very excited to share our latest work, the high-resolution cryo-EM structure of the ex vivo cortical
#microtubules
from human parasite
#Toxoplasma
gondii. This work is in collaboration with David Sibley lab and
@alanbrownhms
lab.
First paper from my lab after entering a new field. Great collaboration with
@alanbrownhms
and
@DutcherLab
! In this paper we use high-resolution
#cryoEM
to identify 38 ciliary doublet associated proteins including 33
#microtubule
inner proteins (
#MIPs
) π
N.O.A. π₯° In the next 5 yrs, I will have money to study the mysterious functions of MIPs inside ciliary doublet microtubules, using chlamydomonas mutants and cryoEM. Stay Tuned.
My academic activitiesΒ in 2023:
- Submitted a multi-PI R01 grant and got 2% score
- Published one Cell paper, one NC paper
- Attended two conferences in person (first since the pandemic)
- Got my tenure approved by theΒ ad hoc committee
Hopefully 2024 will be even better π€
NPC is NOT "the largest molecular machine in human cells". The system we work on, the axoneme within the cilia, for example, has a diameter of ~220 nm with more than >500 distinct protein components. In comparison, NPC has a diameter of ~130 nm and <50 distinct proteins.
We are thrilled to share our latest structures of doublet microtubule from sea urchin sperm and bovine sperm. This is a wonderful collaboration withΒ Tzviya Zeev-Ben-Mordehai
@TzviyaZBM
, Alan Brown
@alanbrownhms
, and Susan Dutcher
@DutcherLab
.
Please RT: One postdoctoral position is available in my lab ()
@WUSTLmed
to study the structures and functions of native macromolecular complexes related to
#microtubule
#cilia
and
@cytoskeleton
from various species including
#parasites
and human.
This is one of my all-time favorite articles by
@sami_chaaban
&
@GaryBrouhard
:
If I can get the money, I would love to solve structures of the
#microtubule
in Fig. 4 and 7! Working with mosquitoes should fall into the 'high-risk-high-reward' category π€
Another wonderful collaboration with
@alanbrownhms
and
@DutcherLab
. Here we put complementary data together to build the complete structure of two distinct radial spokes on doublet microtubule. It was also a great experience to coordinate with the Vale lab for paper submission.
Hi, we are still actively looking for postdoc(s). Candidates with structural biology background or passion for microtubule/cilia are preferred. Please retweet.
Please RT: One postdoctoral position is available in my lab ()
@WUSTLmed
to study the structures and functions of native macromolecular complexes related to
#microtubule
#cilia
and
@cytoskeleton
from various species including
#parasites
and human.
Another groundbreaking study by the
@GaiaPigino
lab! As the authors speculated (and in our 2019 paper as well), MIPs could recruit different tubulin modifying enzymes to specific PFs. In fact, MIP FAP90 has half of its length lies at the external surface, between PF B08 and B09!
Delighted that Bob Glaeser's,
@NogalesLab
's, &
@chiulab
's new textbook on cryoEM is now published - with a lovely dedication to Ken Downing. Highly educational chapters from many experts from the cryoEM community. Sure to become a classic - but hopefully out of date soon!
Our laboratory has postdoctoral position(s) available to work on cryo-EM of large and dynamic membrane protein complexes.
Cryo-EM experience is not required.
Please RT!
Preparing a talk at my alma mater Baylor College of Medicine this Thursday. I dig out an old photo on my thesis defense day in 2010. As a graduate student I collaborated with scholars at Washington University in St. Louis, which is my home now.
#nostalgia
#sichuan_food
This utilizes the full power of cryo-EM π I wish more and more structural labs are doing this kind of approach, even though it is not "hypothesis driven" π€ͺ
The iterative βBuild and Retrieveβ (BaR) methodology from Edward Yu from
@CWRUSOM
and colleagues facilitates solving cryo-EM structures of multiple membrane (and soluble) proteins simultaneously.
Previously we managed to obtain the first atomic structure of microtubule with the help of markers for tubulin dimer (kinesin, EB3, TPX2...), now we can do it without the markers!
Separating the effects of nucleotide and EB binding on microtubule structure
Please see a dispatch that
@alanbrownhms
and I wrote about the recent publication of the beautiful cryo-ET structure of primary cilia from
@GaiaPigino
group.
Dear all, I forgot to update the test results: using similar number of particles, the ones from cubic ice and vitreous ice produce 3D reconstructions with similar resolution/quality.
I always wanted to try BioRxiv, but for every paper we always have at least one prominent group directly competing on the same structure. Seems preprinting is a bit risky for structural biology when the paper is about identification of new proteins. Correct me if I am wrong π
Settle an argument for me: What prevents a greater proportion of scientists from preprinting? Lack of info, fear/distaste of sharing work prior to peer review, perceived lack of benefit/reward/credit, what else? Muting replies so I can work, but thanks in advance! π
Our TPX2 paper is finally out in
@eLife
IMO a big step towards our understanding of the mysterious process of microtubule nucleation. From 0 to 1 is always a big deal!
Doesn't matter where it is published, doesn't matter what is the so called "biological significance", this is one of my favorite structures of ALL TIMEπ
Just when you think you have it all, Venecia Valdez and team from
@RuiZhangWUSTL
and
@LabPetry
prove us wrong: HURP facilitates spindle assembly by stabilizing microtubules and working synergistically with TPX2
A great achievement in cilia field towards the understanding and treatment of human primary ciliary dyskinesia (PCD) π And remarkable evolutionary conservation between the green algae and human! Congratulations to the team! π₯³
A mini-review with James Garnett for
@FrontMolBioSci
discusses EM & ssNMR developments in the structural biology of filaments over the last decade or so, focussing on microtubules and pili.
Amazing how much these fields have progressed!
Open access here;
It's here: QB3-Berkeley,
@NogalesLab
, and
@TheHurleyLab
have welcomed a
@thermofisher
Krios G3i Cryo-TEM to Stanley Hall! π
This new instrument will help increase the
@UCBerkeley
research community's access to cryo-electron microscopy π₯Όπ¬ π₯³
Congratulations to the team! I have to confess that the Abeta42 fibril structure we determined in 2009 (fibrils grown at PH 2π ) looks nothing like the native structure π but we are not alone π This is exactly the reason we all should go native!
Thanks to the modern technology, we still got to hear Sunney Xieβs wonderful talk at
#bps20
@BiophysicalSoc
, and learn his heroic efforts in fighting
#nCoV2019
"CKAP2 increases the apparent rate constant Ka of microtubule growth by 50-fold and increases microtubule growth rates...Our results identify CKAP2 as the most potent microtubule growth factor to date."
Believe or not, we only get to see the other paper today. Beautiful structure and functional data! It is great to see different approaches reached the same protein assignment π₯³
In my first tweet, I'm excited to share my work on reconstituting the radial spoke head - 9 proteins! Thank you,
@BhabhaEkiertLab
,
@ZanlinCryo
and
@halfbuddha
for making 3.1 A possible!
Hello
#cellbio2023
so great to be back in person! I look forward to reconnecting with old friends and meeting new friends! My postdoc Jianwei Zeng will give a talk on sperm flagella structure on Dec 5th 5:20pm.
This is very impressive work! Congratulations, Kai! It is amazing to see how high-res single particle cryo-EM has advanced the motile cilia field in the past few years! Of course, none of these can be easily designed/interpreted without the knowledge from previous work by cryo-ET
Folks at
@WUSM_BMB
, no more wondering about the suspicious fish tank with edible purple sea urchins (that I brought from a restaurant in Monterey CA).
Augmin is required for the nucleation of new microtubules from preexisting MTs. Song et al
@PrincetonMolBio
show that augmin functions as a direct bridge between the preexisting MT and the Ξ³-tubulin ring nucleation complex that forms the base of the new MT
@builab
Sorry about thatπ You work have been a great inspiration for us! I think your recent cryo-EM map is at similar quality, the only missing factor is
@alanbrownhms
π
The EMDB and PDB entries for our recent
#ciliary
#doublet
#microtubule
paper are finally released, including two high-resolution structures of Rib72 and FAP166 mutants. Note we also included a 39-pages Data S1 (Protein Identification and Assessment Reports) in the Supplement.
Garrett A. Greenan, Ronald D. Vale, & David A. Agard
@UCSF
use electron cryo-tomography analysis of intact motile
#cilia
to elucidate how basal bodies template the formation of motile axonemes
Proud to be working at
@VAInstitute
, where weβre taking more steps to truly invest in our postdocs! The STARTING salary for postdocs will now be $70k, plus full benefits including retirement! Our labs are hiring, please contact us if you are interested.
Hi Twitter! I'm excited to present our preprint on centriole migration in olfactory sensory neurons. A super fun collaboration with the talented Katie Ching
@StearnsLab
ππΌ Meet imaging grantee Wah Chiu. His team
@Stanford
is
#ImagingTheFuture
to improve our understanding of how cells function in health + disease.
With new
#tech
, researchers could watch the parasite that causes malaria invade healthy human cells to understand how to stop it
The detailed "methods" we did to solve the structures of outer-arm dynein bound to microtubules (). I hope the approach can be applied to other Dyneins! Cannot wait to see more structures of motors bound to microtubules in different binding states!
My interactions with Michael is sporadic throughout the years, but I still remember the thrill when I talked to him for the first time in an elevator. It was also fun to have 1-on-1 breakfast with him at 7am when I visited Purdue. It is so sad to lose another giant of our time.
With great sadness we acknowledge the passing of
@PUCancerCenter
researcher Dr. Michael Rossmann. He was a brilliant researcher in the field of structural biology. We are ever grateful for his research and dedication. Read more about his legacy here:
Happy to share our new
@biorxivpreprint
: βArchitecture of the human erythrocyte ankyrin-1 complexβ from Clarke lab (first author the incredibly talented
@Frances84469032
) and collaborators
@lab_cali
and
@alexjamesnoble
! Read on to find out more (it was a surprise packageβ¦):
Congratulations to researcher Edward H. Egelman, PhD, who has been elected to the National Academy of Sciences, one of the highest honors for a scientist
@theNASciences
@MedicineUVA
There's (quite rightly) a lot of raving about the new AlphaFold DB resource today. Thought I'd weigh in with my own example. DNA-dependent protein kinase catalytic subunit () is an enormous beast - a single chain of 4,128 residues! (1/10)
Who wants to be my first hire?
@WUSM_BMB
is inviting applications for a tenure-track Assistant Professor working in any area of biochemistry or molecular biophysics. See for more details. URMs, women and diversity scientists are esp encouraged to apply!
New Short Article online now at Dev Cell: Ξ±-tubulin tail modifications regulate microtubule stability through selective effector recruitment, not changes in intrinsic polymer dynamics -
Join us in St. Paul! Since 2007, this conference has been the premier venue for cilia and flagella research. Organizers
@PeterKJackson
,
@Mill_lab
, and
@ReiterLab
have created a great program for our first SRC of 2024.
#BCFSRC
#CellBio
Save your space:
Very excited to share our new preprint where we develop MIC, a deep metric learning tool for classifying waters & ions in experimental structures; fantastic collaboration with the extremely talented Laura Shub and Selina Liu from the Keiser lab!
This is a continuous collaboration with
@alanbrownhms
and
@DutcherLab
lab, following our previous work on the doublet microtubule and radial spoke from the best model organism Chlamydomonas.
@miao_gui
and
@Xiangli_Wang66
are the co-first authors.