It is part from science category and is licensed as shareware for Windows 32-bit and 64-bit platform and can be used as a free trial until the trial period will end. The PyMOL demo is available to all software users as a free download with potential restrictions compared with the full version.
Q: Is PyMOL Free? Just how much does it cost to download ?A: Absolutely nothing! Download this app from official sites for free by this Portal Website. Any additional information about license you are able to found on owners sites.
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Download free PyMOL 2.5.4 on our website. Our antivirus system always scans the software for malware. It scanned PyMOL and reported that it is clean to use. According to the information on our software library the most popular versions of the tool are: 2.2, 2.1 and 1.7.
You may come across a failure in the software due to windows 7 NOT accepting unsigned drivers, plus your installing in the root directory which is a bad idea as Win 7, 8 and so on have blocks in place for legacy type installations in the root directory.
A confirmation email with password will be sent to you, after you register your email in the I-TASSER server.But since the confirmation emails were sent out automatically by computer, it is possible that the confirmation email was filtered out by your email security system. So it is wise to check your junk E-mail folders, if you did not receive a confirmation email in your inbox in time. If you found that you did not receive the confirmation email one hour after you correctly submitted your registration information, please contact yangzhanglab@umich.edu and let us know the email that you registered. We can resend the registration information to you, manually.2. Why does my password not work for I-TASSER Server?If you copy and paste your password from the confirmation email, please remember not to include any space before and after the password. For example, if your password is IT_8abcd, please make sure that you did not type in " IT_8abcd" or"IT_8abcd ", which is the mistake most frequently made by new users.3. Why does my password not work for I-TASSER Suite, I-TASSER Forum, or QUARK server?Are you using the password obtained from I-TASSER server to download I-TASSER Suite? The I-TASSER Server, I-TASSER Suite, I-TASSER Forum, and QUARK webserver are independent systems. You need to register them separately for different passwords.4. How can I predict the structure of a protein with >1,500 residues?(Short answer) No, you can not. The I-TASSER server only accepts for sequence below 1,500 residues.(Long answer) The server version of I-TASSER has not been optimized for multi-domain proteins prediction. Therefore, if you upload a large protein with more than one domain, more often than not you will only get accurate prediction for one of your domain. If you have a protein longer than 1,500 residues, you can split the sequence into domains either by Pfam search, or by ThreaDom. You can then submit the sequence of each domain separately. This should generate models of higher accuracy. You can then assemble individual domains into full lengthstructure by DEMO.5. How can I run I-TASSER suite on Mac, Windows or 32-bit Linux?All components of I-TASSER suite were developed on 64-bit Linux. All itsFortran and C++ binary executables are compiled for 64-bit Linux only.This means that it is currently impossible to run I-TASSER suite on Mac OS.It is also impossible to run I-TASSER suite on any 32-bit system, including32-bit Linux. As I-TASSER suite is memory intensive, there is no point tryingto make I-TASSER run on 32-bit system where no more than 4Gb of memory couldbe addressed.It is impossible to run I-TASSER on Windows, including Windows Subsystem for Linux(also known as "Ubuntu on Windows").6. Why my SAXSTER prediction did not return any result?Usually, this happens when you submit invalid SAXS profile. For SAXSTER to work, you need to upload either SAXS Pair Distance Distribution Function p(r) or SAXS Intensity profile I(q). If your uploaded p(r) or I(q) profile is empty (all zeros) or contains at least one p(r) value smaller than zero or greater than one, SAXSTER will not work.7. How can I use I-TASSER models to study the effect of mutations on the overall topology?(Short answer) No, you cannot. Overall topology of I-TASSER models for different mutant of the same protein is usually very similar.(Long answer) A structure model can tell you where is the mutation, e.g. if itis near ligand binding site, an active site, or at protein-protein interaction interface, etc. However, unless you have introduced a substantial number of mutations, or introduce long insertion/deletetion, different mutants of thesame protein usually have similar final I-TASSSER structures. This is in accordance with our observation on experimental structure in PDB, wild type protein and mutant protein of a small number of substitution usually sharesalmost identical conformation, even if their function might differsignificantly. We have developed a pipeline called STRUM to address the effect of single mutations on a protein, specifically the stability differences between native protein and its mutants.8. How do I report bugs for web servers and bioinformatics tools in Yang Zhang lab?If you have successfully submit jobs via web server, but the webserver did not send any result back after two weeks, you should check whether your input isincorrect. If you are sure it is a bug, please report it to yangzhanglab@umich.edu using the email you used for job submission and report the web service you used and your Job ID.If you find a bug in standalone software downloaded from Yang Zhang lab website, such as I-TASSER suite, please report it to the Service System Discussion Board. You need to provide the following information: [1] input files, [2] output files, [3] command you used to run the software and its screen output, [4] if you recompile the software yourself, instead of using our precompiled binaries, please report the compiler version (e.g. gfortran 4.8) and compilation command you used, [5] the operating system (e.g. Ubuntu Linux Trusty 14.04 amd64, or Mac OSX 10.11.1 EL Capitan) and CPU description; under Linux please send the output of: uname -a; lsb_release -a; head -n 25 /proc/cpuinfo; ulimit -a; free9. What are the 'top 10 templates used by I-TASSER' in the Result page?I-TASSER modeling starts from the structure templates identified by LOMETS fromthe PDB library. LOMETS is a meta-server threading approach containing multiple threading programs,where each program can generate tens of thousands of templates. I-TASSERonly uses the templates of the highest significance in the threadingalignments, which are measured by the Z-score (the difference between theraw and average scores in the unit of standard deviation).The top 10 templates are the 10 templates selected from the LOMETSthreading programs. Usually, one (or two) template of the highest Z-scoreis selected from each threading program, where the threading programs aresorted by the average performance in the large-scale benchmark test experiments.10. What is the 'top 5 models predicted by I-TASSER' in the Result page?For each target, I-TASSER simulations generate tens of thousands conformations (called decoys). To select the final models, I-TASSER uses SPICKER program tocluster all the decoys based on the pair-wise structure similarity, and reportup to five models which corresponds to the five largest structure clusters.In Monte Carlo theory, the largest clusters correspond to the states of thelargest partition function (or lowest free energy) and therefore have thehighest confidence. The confidence of each model is quantitatively measured byC-score (see below). Since the top 5 models are ranked by the cluster size, it is possible that the lower-rank models have a higher C-score. Although the first model has a higher C-score and a better quality in most cases, it is not unusual that the lower-rank models have a better quality than the higher-rank models.If the I-TASSER simulations converge, it is possible to have less than 5 clustersgenerated. This is usually an indication that the models have a good qualitybecause of the converged simulations.11. What are 'Proteins structurally close to the target in the PDB' in the Result page?After the structure-assembly simulation, I-TASSER use TM-align program to match the first I-TASSERmodel to all structures in the PDB library. This section reports the top10 proteins from the PDB which have the closest structural similarity (i.e. the highest TM-score) to thepredicted I-TASSER model. Due to the structural similarity, these proteinsoften have similar function to the target. However, users are encouraged touse the data in 'Predicted function using COACH' to infer the biological function of the target protein, since COACH has been extensively trained toderive function from multi-source of sequence and structure features whichhas on average a much higher accuracy than the function annotations derived only from the global structure comparison.12. What is C-score in the Result page?C-score is a confidence score for estimating the quality of predicted models by I-TASSER. It is calculated based on the significance of threading template alignments and the convergence parameters of the structure assembly simulations. C-score is typically in the range of [-5,2], where a C-score of higher value signifies a model with a high confidence and vice-versa.13. What is TM-score in the Result page? TM-score is a recently proposed scale for measuring the structural similarity between two structures (see Zhang and Skolnick, Scoring function for automated assessment of protein structure template quality, Proteins, 2004 57: 702-710). The purpose of proposing TM-score is to solve the problem of RMSD whichis sensitive to the local error. Because RMSD is an average distance of all residue pairs in two structures, a local error (e.g. a misorientation of the tail) will arise a big RMSD value although the global topology is correct. In TM-score, however, the small distance is weighted stronger than the big distance which makes the score insensitive to the local modeling error. A TM-score >0.5 indicates a model of correct topology and a TM-score 2ff7e9595c
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