# How to change the residue name of a specific site?

**URL:** <https://ask.bioexcel.eu/t/how-to-change-the-residue-name-of-a-specific-site/3123>\
**Category:** PDB-tools\
**Created:** [June 22, 2021, 5:43am UTC](https://ask.bioexcel.eu/t/how-to-change-the-residue-name-of-a-specific-site/3123 "2021-06-22T05:43:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kychung2](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/kychung2/32/478_2.png) [@kychung2](https://ask.bioexcel.eu/u/kychung2)\
**Post date:** [June 22, 2021, 5:43am UTC](https://ask.bioexcel.eu/t/how-to-change-the-residue-name-of-a-specific-site/3123/1 "2021-06-22T05:43:06Z")

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“pdb\_rplresname” changes all residues with that name.  
How can I change the residue name of a specific site?

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<div class="post-metadata">

**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [June 22, 2021, 7:01am UTC](https://ask.bioexcel.eu/t/how-to-change-the-residue-name-of-a-specific-site/3123/2 "2021-06-22T07:01:25Z")

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Indeed all instances are changed.

You could use instead for a specific residue the `pdb_mutate.py` script from `haddock-tools`

[https://github.com/haddocking/haddock-tools/blob/master/pdb\_mutate.py](https://github.com/haddocking/haddock-tools/blob/master/pdb_mutate.py)

It will only change the residue name, but not add or remove atoms.