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Industrial Biostructures America (IBA) Conference 2026
by Xu, Rui [JRDUS] 09 Jan '26

09 Jan '26

We are pleased to share that the Industrial Biostructures America<https://www.industrialbiostructuresamerica.org/> (IBA) Conference will return to the Boston/Cambridge area on May 11-12, 2026, hosted at Sanofi's Cambridge Crossing R&D campus. IBA is a forum for the structural biology community across North America, bringing together leading voices to share insights on the application of structural biology technologies to drug discovery challenges across the industry. This event also fosters valuable networking opportunities and collaborative discussions that drive our field forward. Registration is now open, with early-bird rates before March 1, 2026. Note that the last meeting sold out, so please ensure you reserve your spot. Conference information is available at Industrial Biostructures America<https://www.industrialbiostructuresamerica.org/> along with registration and abstract submission forms. Scientific sessions will cover the following topics: * Proximity & fragments * Membrane protein structure * Conformational dynamics & allostery * Cryo-EM & practical applications of state-of-the-art techniques * Biologics and protein engineering * AI/ML in drug discovery and the future of structural biology For exhibitor/sponsorship opportunities or any other questions, please contact us at iba(a)proteros.com. Looking forward to seeing you in May! Rui Xu Sr. Principal Scientist Johnson and Johnson

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transform C2 to P1 and the R-free set
by Jorge Iulek 27 Dec '25

27 Dec '25

Dear all, I got a set of images (very recently) . Dials gives me: +------------+--------------+--------+--------------+----------+-----------+-------------------------------------------+----------+-----------+ | Solution | Metric fit | rmsd | min/max cc | #spots | lattice | unit_cell | volume | cb_op | |------------+--------------+--------+--------------+----------+-----------+-------------------------------------------+----------+-----------| | * 2 | 0.3001 | 0.066 | 0.272/0.272 | 10685 | mC | 212.43 81.92 133.04 90.00 113.12 90.00 | 2129290 | a-2*b,a,c | | * 1 | 0 | 0.052 | -/- | 10559 | aP | 81.95 113.64 133.10 68.50 89.98 69.13 | 1065523 | a,b,c | +------------+--------------+--------+--------------+----------+-----------+-------------------------------------------+----------+-----------+ Many indications are that the 2-fold axis is not really crystallographic, but a pseudo one. My point in this case is that reflections related by this "almost" 2-fold axis should go into the same set, free and work, this in the (new) P1 setting. I could not devise clearly how to get a program to do this automatically (say, flag reflections with this pseudo 2 related for free -set ) . Is there? I understand cb_op is the real space operation, possibly out of a crystallography package I can get that, but easier if there is a crystallographic tool. Any thoughts? Thanks, Jorge (Season's Greetings)

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amberprep problem
by George Phillips 26 Dec '25

26 Dec '25

I am trying to run phenix.AmberPrep in phenix-2.0-5885 and get the flollowing but cannot find a leap.log file to check. Any clues? pdb file attached. Thanks, George georgep@Y56NQ4XRRC 7W26 % phenix.AmberPrep noH.pdb minimise=amber_all ================================================================================ Running pdb4amber on noH.pdb ================================================================================ ================================================== Summary of pdb4amber for: noH.pdb =================================================== ----------Chains The following (original) chains have been found: A B S ---------- Alternate Locations (Original Residues!)) The following residues had alternate locations: None -----------Non-standard-resnames ---------- Missing heavy atom(s) None ================================================================================ Setting up library files for non-standard residues ================================================================================ ================================================================================ Preparing asu files and 4phenix_noH.pdb ================================================================================ Checking output filenames file : noH_asu.prmtop Sorry: Output file not present : noH_asu.prmtop Check contents of “leap.log"

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Phenix real space refine use for Cryo-EM model refinement
by dishajawadekar295＠gmail.com 23 Dec '25

23 Dec '25

Hi, I am using Phenix real space refine to refine my cryo-EM model. My model is looking good (based on molprobity statistics) but I would like to run an additional round of Phenix refinement without allowing the program to move the side chains. From what I see, Phenix moves the side chains by default. What settings can I use to avoid this? Thank you.

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phenix.polder issue
by robert＠oeffner.net 19 Dec '25

19 Dec '25

Hi, I think there's a slight glitch in Polder which I am currently testing. The program works fine. However, the log file shows the full phil parameter for the selection string solvent_exclusion_mask_selection whereas the json file does not. As an example I have a log file: ------------------------------------------------------------------------------- data_manager { miller_array { file = "../74343_262277_1_1.mtz" } default_miller_array = "../74343_262277_1_1.mtz" model { file = "../74343_262277_4_1+ligands.pdb" } default_model = "../74343_262277_4_1+ligands.pdb" } polder { box_buffer = 5 } solvent_exclusion_mask_selection = ( chain Y and ( ( resseq 1 and name C1 \ ) or ( resseq 1 and name C2 ) or ( \ resseq 1 and name C3 ) or ( resseq 1 and \ name C4 ) or ( resseq 1 and name C5 ) or \ ( resseq 1 and name N6 ) or ( resseq 1 \ and name C7 ) or ( resseq 1 and name H8 \ ) or ( resseq 1 and name H9 ) or ( \ resseq 1 and name H10 ) or ( resseq 1 \ and name H11 ) )) mask_output = True output { overwrite = True } But in the polder_modified.eff.json file it reads: ------------------------------------------------------------------------------- { "data-manager-miller-array-file": "../74343_262277_1_1.mtz", "data-manager-default-miller-array": "../74343_262277_1_1.mtz", "data-manager-model-file": "../74343_262277_4_1+ligands.pdb", "data-manager-default-model": "../74343_262277_4_1+ligands.pdb", "polder-box-buffer": 5, "solvent-exclusion-mask-selection": "(", "mask-output": true, "output-overwrite": true } Regards, Rob

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new XDS package (BUILT=20251103) for academic users
by Kay Diederichs 16 Dec '25

16 Dec '25

Dear XDS users, the latest binaries of the XDS package are available for academic users from the “downloading” link at https://xds.mr.mpg.de/ . As the linked “Release Notes” indicate, a few changes were made to output formats, and the requirement for a dynamic library (libquadmath.so), which is not installed by default in most Linux distributions, was eliminated. If you are already running BUILT=20250714, there is no reason to upgrade. In addition to the routine testing against specific datasets performed by Wolfgang Kabsch and me for new XDS packages, this one was tested against a larger database of datasets put together by Clemens Vonrhein and Gerard Bricogne (Global Phasing), who also devised a range of analysis and display tools. A procedure for comparing this and future XDS packages against earlier ones, using a further expanded database, is being implemented in the “XDS reproducibility project” that was convened by Max Burian (Dectris) and is hosted in the Dectris Cloud. Besides the five people mentioned, Camilla Larsen (Dectris), Gleb Bourenkov (EMBL Hamburg) and Ashwin Chari (Max Planck Institute for Multidisciplinary Sciences, Göttingen) are contributing to this project. We expect this effort will ensure the reliability of the XDS package, improve its usage, and enhance the resulting data quality. Best wishes, Kay

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REMINDER – Abstract Submission - 2026 ISMSM || DEADLINE - December 15
by Jose Artur Brito 11 Dec '25

11 Dec '25

Dear Colleagues, This is a reminder that abstract submission for the 7th International Symposium on Microbial Sulfur Metabolism (7th ISMSM), will CLOSE in December 15th. The meeting will take place in Lisbon, Portugal, from 17–20 March, 2026, and will bring together researchers from across the globe to explore the latest advances in microbial sulfur cycling, from molecular mechanisms to ecological, environmental and health perspectives. A number of talks will be selected from the abstracts, so please register and submit your abstract! https://wmsm.itqb.unl.pt/registration/ 👉 For more information visit: https://wmsm.itqb.unl.pt/ Please share this announcement with colleagues and collaborators who may be interested. We look forward to welcoming you in Lisbon next March! The Organising Committee Inês Cardoso Pereira, Filipa Sousa, José Artur Brito, Andreia Pimenta and Américo Duarte ismsm(a)itqb.unl.pt --

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Phenix density modification - EMDB deposition
by Dmitry Semchonok 20 Nov '25

20 Nov '25

Dear Colleagues, I am preparing to deposit a cryo-EM structure to EMDB/PDB and have encountered an important question regarding resolution reporting and half-map deposition after Phenix density modification. My Situation: 1. I performed 3D refinement in CryoSPARC, generating two independent half-maps 2. I calculated FSC between these original half-maps at the 0.143 threshold: X Å resolution. 3. I processed these half-maps through Phenix resolve_cryo_em for density modification 4. Phenix reports improved resolution of Y Å (based on corrected FSC as documented in your resolve_cryo_em guide) 5. I generated the corresponding FSC XML file from Phenix showing Y Å Questions: When I deposit to EMDB, I understand the policy requires depositing the original, unmodified half-maps (unfiltered, unmasked, unsharpened). However, when EMDB validates the deposition by independently recalculating FSC from these half-maps, they will obtain X Å, not Y Å. This creates an apparent contradiction: • Deposited FSC XML file: Y Å (from Phenix) • EMDB independent FSC calculation from deposited half-maps: X Å (from originals) * When you apply corrections for correlations introduced by density modification in resolve_cryo_em, does this mean the Y Å resolution should be reported as the official resolution, even though the original half-maps show X Å? * What is the recommended workflow when depositing density-modified maps to ensure consistency and avoid validation conflicts? Additionally: • No atomic model was used; only sequence information • The density modification improved map quality and interpretability as intended Thank you. Kind regards, Dmitry

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path errors phenix 1.21.2-5419 MacOS
by Guenter Fritz 18 Nov '25

18 Nov '25

Dear Phenix developers, I spotted two little errors in the path when phenix_ready_set or phenix.elbow calling files (I fixed it myself by copying the files/folder to the right place) Just for the notes: phenix.ready_set ....... Reduce warnings ERROR CTab(/opt/phenix-1.21.2-5419/lib/python3.9/site-packages/*elbow*/resources/monomer_het_dict.txt): could not open The path should be /opt/phenix-1.21.2-5419/lib/python3.9/site-packages/resources ------------------------------------------ phenix.elbow ....... AssertionError: Missing the file /opt/phenix-1.21.2-5419/lib/python3.9/site-packages/elbow/*elbow*/smiles Path should be /opt/phenix-1.21.2-5419/lib/python3.9/site-packages/elbow/smiles Best regards, Guenter

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Coot 1 - "Open in Coot" within Phenix - auto loading PDB/mtz/extensions
by kelvin.lau＠epfl.ch 07 Nov '25

07 Nov '25

Hi all As the stability of Coot1 increases I am looking to start the transition there from old Coot I can get Phenix to open Coot 1 via the Open in Coot buttons. However, it does not autoload the PDB/mtz/Phenix extensions. I know there are many differences between Coot 0.9X and Coot1 under the hood so just want to see if this was currently possible or if it’s something due to my parameter setups somewhere. Would be very useful to implement if not. Best Kelvin

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