The hidden Markov model (HMM) profile of the RCC1 gene family (PF00415) in PFAM (http://pfam.xfam.org/) was downloaded and used to identify the RCC1 genes in the local protein database of bread wheat, emmer wheat (Triticum dicoccoides, 2n = 4x = 28, AABB) and Aegilops tauschii (2n = 2x = 14, DD) (downloaded from Ensembl Plants, http://plants.ensembl.org/index.html) with the hmmsearch tool of HMMER3.1 software (HMMER 3.1; http://hmmer.org/). To avoid missing RCC1 family members, an aligned file of a high-quality protein set (E value < 1 × 10−20) in MEGA X software (Kumar et al., 2018 (link)
) was used to reconstruct the new HMM profile, which was used as the query to search all the RCC1 members (E value < 0.01) in all bread wheat, emmer wheat, and Aegilops tauschii proteins, respectively. All the detected protein sequences were submitted to the PFAM (http://pfam.xfam.org/), SMART domain search (http://smart.embl.de/smart/batch.pl) (Letunic et al., 2021 (link)
), and NCBI Batch CD-search database (https://www.ncbi.nlm.nih.gov/Structure/bwrpsb/bwrpsb.cgi) to confirm the structural integrity of the RCC1 domain (Marchler-Bauer et al., 2005 (link)
). The non-redundant, verified genes encoding proteins with RCC1 domains were assigned as members of the RCC1 gene family.
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