ACCORD: An assessment tool to determine the orientation of homodimeric coiled-coils

Byeong Won Kim, Yang Ouk Jung, Min Kyung Kim, Do Hoon Kwon, Si Hoon Park, Jun Hoe Kim, Yong Boo Kuk, Sun Joo Oh, Leehyeon Kim, Bong Heon Kim, Woo Seok Yang, Hyun Kyu Song

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5 Citations (Scopus)


The coiled-coil (CC) domain is a very important structural unit of proteins that plays critical roles in various biological functions. The major oligomeric state of CCs is a dimer, which can be either parallel or antiparallel. The orientation of each α-helix in a CC domain is critical for the molecular function of CC-containing proteins, but cannot be determined easily by sequence-based prediction. We developed a biochemical method for assessing differences between parallel and antiparallel CC homodimers and named it ACCORD (Assessment tool for homodimeric Coiled-Coil ORientation Decision). To validate this technique, we applied it to 15 different CC proteins with known structures, and the ACCORD results identified these proteins well, especially with long CCs. Furthermore, ACCORD was able to accurately determine the orientation of a CC domain of unknown directionality that was subsequently confirmed by X-ray crystallography and small angle X-ray scattering. Thus, ACCORD can be used as a tool to determine CC directionality to supplement the results of in silico prediction.

Original languageEnglish
Article number43318
JournalScientific reports
Publication statusPublished - 2017 Mar 7

ASJC Scopus subject areas

  • General


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