Tally the number of atoms by element in a given RNA strand

Some ab inito structure determination programs require the number of atoms by element expected in the asymmetric unit. This program returns the number of atoms by element based on the single-letter RNA base sequence given as a command line argument. This program assumes that there is a 5'-phosphate. Adjust the results accordingly if this is not the case.

Usage: python script.py SEQUENCE
Example: python script.py AGAGAAGAAAGGGAAAUUUUUUUUUUUUUUUU

Example output.

Atom counts for RNA sequence: AGAGAAGAAAGGGAAAUUUUUUUUUUUUUUUU
----------------------------------------
C: 304
H: 448
N: 112
O: 262
P: 32

The script only depends on Python3. It imports only the sys module.

Update history

Version	Changes	Date
Version 0.1	Added badges, funding, and update table. Initial commit.	2025 January 20

Sources of funding

• NIH: R01 CA242845
• NIH: R01 AI088011
• NIH: P30 CA225520 (PI: R. Mannel)
• NIH: P20 GM103640 and P30 GM145423 (PI: A. West)