Genome Property Definition Page

Nameradical SAM pair and His-Xaa-Ser repeats peptide
DescriptionThis Genome Property represents a pair of radical SAM proteins that occur as tandem genes in bacteria. The most likely function for this system is post-translational modification of ribosomally produced peptides. TIGR03979 describes a family with low levels of sequence similarity overall, a C-terminal putative peptidoglycan-binding domain, but also a striking region with five to seven repeats of His-Xaa-Ser. This family only occurs next to the radical SAM pair. Surprisingly, a search based on the His-Xaa-Ser repeat region and just a few flanking amino acids finds that essentially every radical SAM pair has a His-Xaa-Ser repeats region peptide nearby. TIGR03976 describes an additional protein in this system, including one branch of the family with the signature motif LLNDYxLRE.
Parent PropertyGenProp0077: natural products biosynthesis
Literature References
[ 1 ]Haft DH, Basu MK  Biological systems discovery in silico: radical s-adenosylmethionine protein families and their target peptides for posttranslational modification.  J Bacteriol. 2011 Jun;193(11):2745-55.  PMID 21478363

Step NameStep NumRequiredEvidence (Method)Evidence Go Terms
conserved hypothetical protein TIGR03982aux_B2NOTIGR03982 (HMM): His-Xaa-Ser system protein, TIGR03982 family
putative quinone modification maturaseaux_B3NOTIGR03981 (HMM): His-Xaa-Ser system putative quinone modification maturase
LLNDYxLRE motif rSAM-associated proteinhxsDYESTIGR03976 (HMM): His-Xaa-Ser system protein HxsD
His/Ser-rich radical SAM pair-associated proteinhxsRPTNOTIGR03979 (HMM): His-Xaa-Ser repeat protein HxsA
upstream radical SAM proteinhxsSAM1YESTIGR03978 (HMM): His-Xaa-Ser system radical SAM maturase HxsB
downstream radical SAM proteinhxsSAM2YESTIGR03977 (HMM): His-Xaa-Ser system radical SAM maturase HxsC

Parent Properties
GenProp0077natural products biosynthesis

Sibling Properties
GenProp0014polyketide biosynthesis, type I
GenProp0015polyketide biosynthesis, type II
GenProp0040thiotemplate type non-ribosomal peptide biosynthesis
GenProp0169hybrid NRPS-PKS natural pruduct biosynthesis genes
GenProp0724phosphonoacetaldehyde biosynthesis from phosphoenolpyruvate
GenProp0757quorum-sensing, autoinducer-2 system
GenProp0758lycopene biosynthesis from IPP
GenProp0770siderophore biosynthesis
GenProp0807bacteriocin system, heterocycle biosynthesis group
GenProp0808bacteriocin system, TIGR01847 leader group
GenProp0809bacteriocin system, lactococcin 972 group
GenProp0823violacein biosynthesis
GenProp0825bacteriocin system, circular bacteriocin group
GenProp0853lantibiotic system, gallidermin/epidermin family
GenProp0861bacteriocin system, NHLP (nif11/nitrile hydratase leader peptide) transport group
GenProp0901post-ribosomal natural product synthesis system, Burkholderia TOMM-type
GenProp0919SCIFF/radical SAM Clostridial gene pair
GenProp0920radical SAM Y_X(10)_GDL system
GenProp0936bacteriocin system, sporulation delay protein group
GenProp0945radical SAM maturase bacteriocin system, CLI_3235 type
GenProp0954radical SAM-cylized peptide, Pep1357C family
GenProp0955modified peptide/radical SAM maturase system, YydFG family
GenProp0956radical SAM maturase/selenobacteriocin system
GenProp0962methanobactin biosynthesis, Mb-OB3b family
GenProp0967radical SAM maturase system, CXXX repeats type
GenProp0982radical SAM maturase system, FibroRumin system
GenProp0984radical SAM maturase system, GG-Bacteroidales group
GenProp0990cobaltopeptin biosynthesis
GenProp0991ATP-grasp maturase system, microviridin/marinostatin class
GenProp1000ATP-grasp maturase system, uncharacterized
GenProp1002grasp-with-spasm peptide maturase system
GenProp1003cysteine S-glycopeptide biosynthesis, sublancin family
GenProp1029radical SAM/SPASM system SynChlorMet
GenProp1037radical SAM/SPASM system GRRM
GenProp1052geopeptide radical SAM/SPASM maturase system
GenProp1062radical SAM/SPASM system Clo7bot
GenProp1065radical SAM/SPASM TIGR04347/TIGR04031 system
GenProp1078sporulation killing factor system
GenProp1083cyanobactin-like ribosomal natural product biosynthesis
GenProp1084enduracididine biosynthesis
GenProp1090radical SAM/SPASM maturase system XYE
GenProp1097bacimethrin biosynthesis
GenProp10983-methylarginine biosynthesis