Missing key error when parsing PDB entry 7O07

[sforli]

Description of the bug.

The PDB entry 7Oo7 cannot be parsed because an exception is raised.

Do you have any error messages or logs?

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/entropia/dev/ProDy/prody/proteins/ciffile.py", line 133, in parseMMCIF
    result = parseMMCIFStream(cif, chain=chain, segment=segment, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/entropia/dev/ProDy/prody/proteins/ciffile.py", line 238, in parseMMCIFStream
    hd = getCIFHeaderDict(lines)
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/entropia/dev/ProDy/prody/proteins/cifheader.py", line 172, in getCIFHeaderDict
    value = func(lines)
            ^^^^^^^^^^^
  File "/home/entropia/dev/ProDy/prody/proteins/cifheader.py", line 1331, in _getUnobservedSeq
    unobs_seqs[chid] += AAMAP[item['_pdbx_unobs_or_zero_occ_residues.auth_comp_id']]
                        ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'ACE'

What is your setup?

Linux Debian 13, micromamba, Python 3.12.11, numpy 2.0.2

How did you install ProDy?

GitHub commit 068d26543

What did your code look like?

import prody
prody.parseMMCIF("7O07")