Re: [ccp4bb] Renumber residues working PDB file - Applying a sequences numbering to PDB file

2023-02-04 Thread Eleanor Dodson
Usually you can bully coot into doing it but by bit. Say you need to renumber A 1-8. I often have to change the chain id to Z say then renumber Z. And so on . Then go back once you have finished and reset chain id fir Z1-8 to A. Tedious but possible! Or just run a few cycles of buccaneer with your

Re: [ccp4bb] [EXT] Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread kavyashreem
Dear Mark, Thanks for the clarification. Regards Kavya On 2023-02-05 04:02, Mark J. van Raaij wrote: > PS it's probably not a salt crystal...TCEP is not a salt, your ligand I > presume is also not a salt, a small cleaved peptide neither. As to why > previously in a very similar conditi

Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread Mark J. van Raaij
PS it’s probably not a salt crystal…TCEP is not a salt, your ligand I presume is also not a salt, a small cleaved peptide neither. As to why previously in a very similar condition you did get your desired protein plus (other) ligand crystal, it just means the molecule (TCEP') crystallises in a s

Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread Mark J. van Raaij
the unit cell in the c direction is quite long, 49 Å, this gives the relatively close spots in one direction. Mark J van Raaij Dpto de Estructura de Macromoleculas, lab 20B Centro Nacional de Biotecnologia - CSIC calle Darwin 3 E-28049 Madrid, Spain tel. +34 91 585 4616 (internal 432092) Section

[ccp4bb] Renumber residues working PDB file - Applying a sequences numbering to PDB file

2023-02-04 Thread Matt McLeod
Hi all, I have been refining a structure and somehow along the way the residue numbers have completely shifted. For instance, the first section of residues are shifted by say 8 numbers, then there is a gap from where the resnumbers go from 121, 151, 152, 153...and so on. Its quite the mess.

Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread kavyashreem
Dear all, Sorry for the confusion created, I did not mean that a protein would have fit in the small unit cell. My question was - 1. Why are there closely spaced spots arising in salt crystal? 2. If TCEP could crystallize in the condition, I have got a protein (same as this)+ligand (differen

Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread kavyashreem
Dear Mark, I did think it was salt, so I checked the same batch of protein which went for crystallization by running a gel, it was intact, no cleavage. My doubts arose because of two things 1. I crystallized the same protein with another ligand, in very similar condition (10% PEG3350, 50mM Zn

Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread kavyashreem
Hi Jessica, I am quite sure the protein cannot be fit in this unitcell. I was just curious why the diffraction has closely spaced spots. Thanks On 2023-02-04 00:02, Jessica Bruhn wrote: > Hi Kavya, > > As others have mentioned, the unit cell is too small to contain your protein. > With

Re: [ccp4bb] [EXT] Re: [ccp4bb] Regarding the diffraction image

2023-02-04 Thread kavyashreem
Dear Thomas, Interestingly, I had crystallized the same protein with another ligand before with the same condition except that it had sodium citrate in addition. I was able to collect the data for this and it was a protein-ligand complex, which could be seen in the density. So I was speculating