Question: Availability of homology model
gravatar for joepiwity
5.1 years ago by
joepiwity0 wrote:

I intent to construct structure of protein by homology modeling. How would I know if previous homology model of my protein is available or not without going into extensive search results?

ADD COMMENTlink modified 5.1 years ago by Elisabeth Gasteiger1.8k • written 5.1 years ago by joepiwity0
gravatar for Ibrahim Tanyalcin
5.1 years ago by
Ibrahim Tanyalcin1.1k wrote:


Homology modeling will try to model the regions of your protein that are similar in sequence to other proteins of known structure in a given database. It is possible that certain regions of your protein will not be modeled. That being said you can check at:

if your protein is not there try using This tool will get your query protein sequence and try to find templates that exist in their database.

There are also other automated servers such as I-TASSER

You can either use native I-TASSER algorithm which takes into account existing templates or the QUARK which does ab initio prediction, meaning from scratch, without templates and only taking into account the amino acid sequence.

You can also try the automated PHYRE2 server

Here you will have 2 modes, normal and intensive. Templates are used here as well. For all residues you will get a key of confidence scores giving you an idea about the reliability of the model/region that is modeled.

All these are some guidelines. The aforementioned websites will send you results within 1-4 days, no additional work needed other than submitting your fasta sequence. The resulting models should be interpreted carefully, trying to take into account proteins with similar function/structure with known 3D confimation where possible,

I hope this helps,

Good luck with your research,

ADD COMMENTlink modified 12 months ago by _r_am30k • written 5.1 years ago by Ibrahim Tanyalcin1.1k
gravatar for Elisabeth Gasteiger
5.1 years ago by
Elisabeth Gasteiger1.8k wrote:

Further to Ibrahim's reply:

If your protein sequence is in UniProtKB, you can have a look at the "Structure" section of the entry, which links to various model databases, even if no cross-references to PDB are available, e.g. ProteinModelPortal, SMR (Swiss-Model repository), ModBase and MobiDB, e.g.

ADD COMMENTlink written 5.1 years ago by Elisabeth Gasteiger1.8k
Please log in to add an answer.


Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
Powered by Biostar version 2.3.0
Traffic: 1038 users visited in the last hour