Amino acid dipepetide frequency for Tigriopus californicus (Marine copepod)

Apart from single amino acid frequencies one can also calculate so called amino acid dipeptide frequency.

There is 400 possibilites (441 if we consider Xaa as additional 21st amino acid representing all non-standard or unknown amino acids). Thus, if the dipeptides would be present randomly in proteins each amino acid dipeptide should be present with 0.25% frequency. As it is not the case in the nature, for better visablity all more than expected dipepetides are marked by red, and those which are underrepresented are marked by blue in the table.

All values are presented as per milles (‰), therefore need to be multiplied by 10-3.

For more information see sequence space article on Wikipedia.

AlaCysAspGluPheGlyHisIleLysLeuMetAsnProGlnArgSerThrValTrpTyrXaa
Ala
4.611AlaAla: 4.611 ± 0.042
1.129AlaCys: 1.129 ± 0.015
2.885AlaAsp: 2.885 ± 0.02
3.582AlaGlu: 3.582 ± 0.028
2.65AlaPhe: 2.65 ± 0.023
3.446AlaGly: 3.446 ± 0.027
1.626AlaHis: 1.626 ± 0.016
3.386AlaIle: 3.386 ± 0.021
4.019AlaLys: 4.019 ± 0.027
6.24AlaLeu: 6.24 ± 0.037
1.719AlaMet: 1.719 ± 0.015
2.963AlaAsn: 2.963 ± 0.022
3.296AlaPro: 3.296 ± 0.034
2.97AlaGln: 2.97 ± 0.022
3.084AlaArg: 3.084 ± 0.022
5.55AlaSer: 5.55 ± 0.035
3.593AlaThr: 3.593 ± 0.024
3.632AlaVal: 3.632 ± 0.023
0.696AlaTrp: 0.696 ± 0.011
1.505AlaTyr: 1.505 ± 0.016
0.001AlaXaa: 0.001 ± 0.0
Cys
1.025CysAla: 1.025 ± 0.013
0.468CysCys: 0.468 ± 0.012
1.155CysAsp: 1.155 ± 0.018
1.094CysGlu: 1.094 ± 0.017
0.825CysPhe: 0.825 ± 0.012
1.44CysGly: 1.44 ± 0.024
0.66CysHis: 0.66 ± 0.013
0.884CysIle: 0.884 ± 0.016
0.92CysLys: 0.92 ± 0.014
1.929CysLeu: 1.929 ± 0.02
0.388CysMet: 0.388 ± 0.007
0.811CysAsn: 0.811 ± 0.015
1.257CysPro: 1.257 ± 0.028
1.207CysGln: 1.207 ± 0.022
1.031CysArg: 1.031 ± 0.016
1.759CysSer: 1.759 ± 0.026
0.896CysThr: 0.896 ± 0.014
1.132CysVal: 1.132 ± 0.017
0.23CysTrp: 0.23 ± 0.006
0.537CysTyr: 0.537 ± 0.009
0.0CysXaa: 0.0 ± 0.0
Asp
2.89AspAla: 2.89 ± 0.022
1.093AspCys: 1.093 ± 0.019
3.97AspAsp: 3.97 ± 0.036
4.58AspGlu: 4.58 ± 0.03
2.552AspPhe: 2.552 ± 0.02
3.465AspGly: 3.465 ± 0.03
1.597AspHis: 1.597 ± 0.015
3.037AspIle: 3.037 ± 0.019
2.758AspLys: 2.758 ± 0.02
5.751AspLeu: 5.751 ± 0.033
1.351AspMet: 1.351 ± 0.014
2.257AspAsn: 2.257 ± 0.019
3.386AspPro: 3.386 ± 0.024
2.547AspGln: 2.547 ± 0.021
2.731AspArg: 2.731 ± 0.022
4.197AspSer: 4.197 ± 0.03
2.494AspThr: 2.494 ± 0.02
3.343AspVal: 3.343 ± 0.024
0.753AspTrp: 0.753 ± 0.011
1.693AspTyr: 1.693 ± 0.02
0.0AspXaa: 0.0 ± 0.0
Glu
4.448GluAla: 4.448 ± 0.029
1.265GluCys: 1.265 ± 0.027
4.702GluAsp: 4.702 ± 0.03
5.912GluGlu: 5.912 ± 0.05
2.392GluPhe: 2.392 ± 0.02
3.392GluGly: 3.392 ± 0.022
1.486GluHis: 1.486 ± 0.014
3.568GluIle: 3.568 ± 0.026
4.043GluLys: 4.043 ± 0.037
5.319GluLeu: 5.319 ± 0.034
1.672GluMet: 1.672 ± 0.016
2.995GluAsn: 2.995 ± 0.022
2.826GluPro: 2.826 ± 0.028
2.494GluGln: 2.494 ± 0.025
3.491GluArg: 3.491 ± 0.027
4.818GluSer: 4.818 ± 0.028
3.48GluThr: 3.48 ± 0.024
3.862GluVal: 3.862 ± 0.026
0.668GluTrp: 0.668 ± 0.01
1.63GluTyr: 1.63 ± 0.017
0.001GluXaa: 0.001 ± 0.0
Phe
2.314PheAla: 2.314 ± 0.018
0.9PheCys: 0.9 ± 0.013
2.424PheAsp: 2.424 ± 0.021
2.475PheGlu: 2.475 ± 0.019
1.839PhePhe: 1.839 ± 0.022
2.819PheGly: 2.819 ± 0.027
1.286PheHis: 1.286 ± 0.012
2.066PheIle: 2.066 ± 0.022
2.251PheLys: 2.251 ± 0.016
3.972PheLeu: 3.972 ± 0.032
0.989PheMet: 0.989 ± 0.013
1.903PheAsn: 1.903 ± 0.016
2.033PhePro: 2.033 ± 0.019
2.042PheGln: 2.042 ± 0.017
2.107PheArg: 2.107 ± 0.016
3.216PheSer: 3.216 ± 0.022
2.043PheThr: 2.043 ± 0.019
2.655PheVal: 2.655 ± 0.025
0.563PheTrp: 0.563 ± 0.008
1.239PheTyr: 1.239 ± 0.013
0.0PheXaa: 0.0 ± 0.0
Gly
3.655GlyAla: 3.655 ± 0.026
1.096GlyCys: 1.096 ± 0.018
3.165GlyAsp: 3.165 ± 0.023
3.296GlyGlu: 3.296 ± 0.024
2.725GlyPhe: 2.725 ± 0.025
5.55GlyGly: 5.55 ± 0.07
1.791GlyHis: 1.791 ± 0.021
3.065GlyIle: 3.065 ± 0.028
3.332GlyLys: 3.332 ± 0.025
5.446GlyLeu: 5.446 ± 0.032
1.453GlyMet: 1.453 ± 0.019
2.739GlyAsn: 2.739 ± 0.024
3.194GlyPro: 3.194 ± 0.038
2.827GlyGln: 2.827 ± 0.02
3.351GlyArg: 3.351 ± 0.026
5.953GlySer: 5.953 ± 0.043
3.417GlyThr: 3.417 ± 0.024
3.6GlyVal: 3.6 ± 0.021
0.746GlyTrp: 0.746 ± 0.012
1.917GlyTyr: 1.917 ± 0.025
0.0GlyXaa: 0.0 ± 0.0
His
1.43HisAla: 1.43 ± 0.017
0.582HisCys: 0.582 ± 0.012
1.32HisAsp: 1.32 ± 0.014
1.602HisGlu: 1.602 ± 0.016
1.258HisPhe: 1.258 ± 0.013
1.778HisGly: 1.778 ± 0.019
1.363HisHis: 1.363 ± 0.028
1.277HisIle: 1.277 ± 0.012
1.232HisLys: 1.232 ± 0.013
2.808HisLeu: 2.808 ± 0.021
0.63HisMet: 0.63 ± 0.008
1.113HisAsn: 1.113 ± 0.013
1.815HisPro: 1.815 ± 0.018
1.399HisGln: 1.399 ± 0.016
1.48HisArg: 1.48 ± 0.016
2.144HisSer: 2.144 ± 0.019
1.184HisThr: 1.184 ± 0.014
1.622HisVal: 1.622 ± 0.018
0.378HisTrp: 0.378 ± 0.007
0.817HisTyr: 0.817 ± 0.013
0.0HisXaa: 0.0 ± 0.0
Ile
3.034IleAla: 3.034 ± 0.024
1.214IleCys: 1.214 ± 0.017
2.699IleAsp: 2.699 ± 0.02
3.1IleGlu: 3.1 ± 0.023
2.242IlePhe: 2.242 ± 0.02
2.954IleGly: 2.954 ± 0.026
1.511IleHis: 1.511 ± 0.014
2.562IleIle: 2.562 ± 0.022
2.823IleLys: 2.823 ± 0.022
5.233IleLeu: 5.233 ± 0.035
1.24IleMet: 1.24 ± 0.013
2.155IleAsn: 2.155 ± 0.018
3.035IlePro: 3.035 ± 0.023
2.636IleGln: 2.636 ± 0.021
2.839IleArg: 2.839 ± 0.023
4.041IleSer: 4.041 ± 0.025
2.734IleThr: 2.734 ± 0.021
3.182IleVal: 3.182 ± 0.027
0.623IleTrp: 0.623 ± 0.01
1.47IleTyr: 1.47 ± 0.016
0.0IleXaa: 0.0 ± 0.0
Lys
3.961LysAla: 3.961 ± 0.032
1.193LysCys: 1.193 ± 0.018
3.289LysAsp: 3.289 ± 0.024
3.999LysGlu: 3.999 ± 0.032
2.139LysPhe: 2.139 ± 0.018
2.864LysGly: 2.864 ± 0.021
1.379LysHis: 1.379 ± 0.015
3.084LysIle: 3.084 ± 0.023
4.441LysLys: 4.441 ± 0.046
4.872LysLeu: 4.872 ± 0.026
1.556LysMet: 1.556 ± 0.015
2.502LysAsn: 2.502 ± 0.017
2.915LysPro: 2.915 ± 0.03
2.078LysGln: 2.078 ± 0.018
3.703LysArg: 3.703 ± 0.028
4.703LysSer: 4.703 ± 0.03
3.271LysThr: 3.271 ± 0.025
3.51LysVal: 3.51 ± 0.024
0.667LysTrp: 0.667 ± 0.01
1.675LysTyr: 1.675 ± 0.016
0.0LysXaa: 0.0 ± 0.0
Leu
6.446LeuAla: 6.446 ± 0.042
1.71LeuCys: 1.71 ± 0.02
5.415LeuAsp: 5.415 ± 0.028
6.266LeuGlu: 6.266 ± 0.036
3.566LeuPhe: 3.566 ± 0.025
5.369LeuGly: 5.369 ± 0.037
2.216LeuHis: 2.216 ± 0.017
4.557LeuIle: 4.557 ± 0.032
5.754LeuLys: 5.754 ± 0.029
8.0LeuLeu: 8.0 ± 0.045
2.148LeuMet: 2.148 ± 0.02
4.225LeuAsn: 4.225 ± 0.023
4.887LeuPro: 4.887 ± 0.032
3.937LeuGln: 3.937 ± 0.03
4.799LeuArg: 4.799 ± 0.028
7.589LeuSer: 7.589 ± 0.038
5.029LeuThr: 5.029 ± 0.028
5.568LeuVal: 5.568 ± 0.038
1.01LeuTrp: 1.01 ± 0.014
2.185LeuTyr: 2.185 ± 0.018
0.001LeuXaa: 0.001 ± 0.0
Met
2.068MetAla: 2.068 ± 0.019
0.403MetCys: 0.403 ± 0.008
1.604MetAsp: 1.604 ± 0.015
1.773MetGlu: 1.773 ± 0.015
0.946MetPhe: 0.946 ± 0.011
1.613MetGly: 1.613 ± 0.017
0.446MetHis: 0.446 ± 0.008
1.245MetIle: 1.245 ± 0.014
1.55MetLys: 1.55 ± 0.016
1.778MetLeu: 1.778 ± 0.018
0.727MetMet: 0.727 ± 0.012
1.179MetAsn: 1.179 ± 0.013
1.146MetPro: 1.146 ± 0.014
0.752MetGln: 0.752 ± 0.011
1.189MetArg: 1.189 ± 0.013
2.135MetSer: 2.135 ± 0.018
1.44MetThr: 1.44 ± 0.015
1.55MetVal: 1.55 ± 0.013
0.258MetTrp: 0.258 ± 0.005
0.56MetTyr: 0.56 ± 0.01
0.0MetXaa: 0.0 ± 0.0
Asn
2.804AsnAla: 2.804 ± 0.019
0.888AsnCys: 0.888 ± 0.015
2.422AsnAsp: 2.422 ± 0.022
2.901AsnGlu: 2.901 ± 0.021
1.868AsnPhe: 1.868 ± 0.016
3.533AsnGly: 3.533 ± 0.028
1.375AsnHis: 1.375 ± 0.016
2.304AsnIle: 2.304 ± 0.019
2.178AsnLys: 2.178 ± 0.018
4.343AsnLeu: 4.343 ± 0.03
1.07AsnMet: 1.07 ± 0.013
2.423AsnAsn: 2.423 ± 0.026
2.898AsnPro: 2.898 ± 0.023
2.182AsnGln: 2.182 ± 0.019
2.369AsnArg: 2.369 ± 0.021
3.626AsnSer: 3.626 ± 0.026
2.209AsnThr: 2.209 ± 0.019
2.802AsnVal: 2.802 ± 0.021
0.537AsnTrp: 0.537 ± 0.008
1.319AsnTyr: 1.319 ± 0.015
0.0AsnXaa: 0.0 ± 0.0
Pro
3.295ProAla: 3.295 ± 0.031
0.879ProCys: 0.879 ± 0.02
3.047ProAsp: 3.047 ± 0.024
3.644ProGlu: 3.644 ± 0.024
2.043ProPhe: 2.043 ± 0.018
3.469ProGly: 3.469 ± 0.044
1.431ProHis: 1.431 ± 0.019
2.793ProIle: 2.793 ± 0.019
3.364ProLys: 3.364 ± 0.029
4.541ProLeu: 4.541 ± 0.03
1.359ProMet: 1.359 ± 0.015
2.885ProAsn: 2.885 ± 0.023
4.801ProPro: 4.801 ± 0.065
2.371ProGln: 2.371 ± 0.028
2.816ProArg: 2.816 ± 0.025
5.549ProSer: 5.549 ± 0.048
3.486ProThr: 3.486 ± 0.033
3.237ProVal: 3.237 ± 0.025
0.629ProTrp: 0.629 ± 0.009
1.397ProTyr: 1.397 ± 0.015
0.001ProXaa: 0.001 ± 0.0
Gln
2.981GlnAla: 2.981 ± 0.024
0.969GlnCys: 0.969 ± 0.022
2.511GlnAsp: 2.511 ± 0.022
3.023GlnGlu: 3.023 ± 0.026
1.734GlnPhe: 1.734 ± 0.016
2.574GlnGly: 2.574 ± 0.02
1.122GlnHis: 1.122 ± 0.014
2.449GlnIle: 2.449 ± 0.018
2.473GlnLys: 2.473 ± 0.023
3.611GlnLeu: 3.611 ± 0.025
1.141GlnMet: 1.141 ± 0.015
2.052GlnAsn: 2.052 ± 0.018
2.283GlnPro: 2.283 ± 0.026
2.338GlnGln: 2.338 ± 0.04
2.515GlnArg: 2.515 ± 0.023
3.712GlnSer: 3.712 ± 0.022
2.521GlnThr: 2.521 ± 0.018
2.763GlnVal: 2.763 ± 0.022
0.535GlnTrp: 0.535 ± 0.009
1.246GlnTyr: 1.246 ± 0.015
0.0GlnXaa: 0.0 ± 0.0
Arg
3.15ArgAla: 3.15 ± 0.021
0.956ArgCys: 0.956 ± 0.017
2.928ArgAsp: 2.928 ± 0.021
3.258ArgGlu: 3.258 ± 0.026
2.181ArgPhe: 2.181 ± 0.019
3.112ArgGly: 3.112 ± 0.026
1.576ArgHis: 1.576 ± 0.017
2.714ArgIle: 2.714 ± 0.019
3.544ArgLys: 3.544 ± 0.026
4.661ArgLeu: 4.661 ± 0.024
1.201ArgMet: 1.201 ± 0.013
2.493ArgAsn: 2.493 ± 0.02
2.978ArgPro: 2.978 ± 0.026
2.476ArgGln: 2.476 ± 0.021
3.91ArgArg: 3.91 ± 0.034
4.656ArgSer: 4.656 ± 0.037
2.712ArgThr: 2.712 ± 0.022
3.02ArgVal: 3.02 ± 0.021
0.581ArgTrp: 0.581 ± 0.01
1.44ArgTyr: 1.44 ± 0.015
0.0ArgXaa: 0.0 ± 0.0
Ser
5.102SerAla: 5.102 ± 0.033
1.523SerCys: 1.523 ± 0.022
4.544SerAsp: 4.544 ± 0.028
4.8SerGlu: 4.8 ± 0.03
3.29SerPhe: 3.29 ± 0.025
5.778SerGly: 5.778 ± 0.036
2.317SerHis: 2.317 ± 0.02
4.024SerIle: 4.024 ± 0.022
4.576SerLys: 4.576 ± 0.029
7.715SerLeu: 7.715 ± 0.038
1.962SerMet: 1.962 ± 0.018
4.223SerAsn: 4.223 ± 0.029
5.332SerPro: 5.332 ± 0.051
3.753SerGln: 3.753 ± 0.029
4.495SerArg: 4.495 ± 0.034
10.5SerSer: 10.5 ± 0.091
5.144SerThr: 5.144 ± 0.038
4.909SerVal: 4.909 ± 0.028
0.93SerTrp: 0.93 ± 0.012
2.078SerTyr: 2.078 ± 0.023
0.001SerXaa: 0.001 ± 0.0
Thr
3.283ThrAla: 3.283 ± 0.024
1.192ThrCys: 1.192 ± 0.018
2.693ThrAsp: 2.693 ± 0.021
3.021ThrGlu: 3.021 ± 0.022
2.39ThrPhe: 2.39 ± 0.02
3.191ThrGly: 3.191 ± 0.024
1.355ThrHis: 1.355 ± 0.016
2.918ThrIle: 2.918 ± 0.02
3.006ThrLys: 3.006 ± 0.021
5.278ThrLeu: 5.278 ± 0.03
1.306ThrMet: 1.306 ± 0.015
2.613ThrAsn: 2.613 ± 0.021
3.636ThrPro: 3.636 ± 0.034
2.129ThrGln: 2.129 ± 0.017
2.648ThrArg: 2.648 ± 0.02
5.151ThrSer: 5.151 ± 0.039
4.025ThrThr: 4.025 ± 0.056
3.2ThrVal: 3.2 ± 0.022
0.687ThrTrp: 0.687 ± 0.009
1.46ThrTyr: 1.46 ± 0.014
0.0ThrXaa: 0.0 ± 0.0
Val
3.916ValAla: 3.916 ± 0.026
1.335ValCys: 1.335 ± 0.021
3.43ValAsp: 3.43 ± 0.021
3.832ValGlu: 3.832 ± 0.025
2.615ValPhe: 2.615 ± 0.023
3.454ValGly: 3.454 ± 0.025
1.519ValHis: 1.519 ± 0.014
3.377ValIle: 3.377 ± 0.026
3.424ValLys: 3.424 ± 0.026
5.527ValLeu: 5.527 ± 0.038
1.496ValMet: 1.496 ± 0.016
2.618ValAsn: 2.618 ± 0.019
3.42ValPro: 3.42 ± 0.026
2.637ValGln: 2.637 ± 0.021
2.871ValArg: 2.871 ± 0.024
4.698ValSer: 4.698 ± 0.025
3.44ValThr: 3.44 ± 0.018
4.06ValVal: 4.06 ± 0.029
0.686ValTrp: 0.686 ± 0.011
1.531ValTyr: 1.531 ± 0.015
0.0ValXaa: 0.0 ± 0.0
Trp
0.68TrpAla: 0.68 ± 0.011
0.24TrpCys: 0.24 ± 0.006
0.671TrpAsp: 0.671 ± 0.01
0.635TrpGlu: 0.635 ± 0.008
0.529TrpPhe: 0.529 ± 0.009
0.609TrpGly: 0.609 ± 0.011
0.287TrpHis: 0.287 ± 0.007
0.742TrpIle: 0.742 ± 0.011
0.739TrpLys: 0.739 ± 0.01
1.057TrpLeu: 1.057 ± 0.014
0.344TrpMet: 0.344 ± 0.009
0.671TrpAsn: 0.671 ± 0.011
0.501TrpPro: 0.501 ± 0.01
0.461TrpGln: 0.461 ± 0.008
0.665TrpArg: 0.665 ± 0.01
0.953TrpSer: 0.953 ± 0.014
0.755TrpThr: 0.755 ± 0.011
0.665TrpVal: 0.665 ± 0.01
0.179TrpTrp: 0.179 ± 0.005
0.334TrpTyr: 0.334 ± 0.008
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.489TyrAla: 1.489 ± 0.016
0.615TyrCys: 0.615 ± 0.01
1.571TyrAsp: 1.571 ± 0.017
1.673TyrGlu: 1.673 ± 0.016
1.353TyrPhe: 1.353 ± 0.017
1.906TyrGly: 1.906 ± 0.025
0.891TyrHis: 0.891 ± 0.013
1.273TyrIle: 1.273 ± 0.015
1.375TyrLys: 1.375 ± 0.016
2.596TyrLeu: 2.596 ± 0.023
0.61TyrMet: 0.61 ± 0.01
1.231TyrAsn: 1.231 ± 0.015
1.395TyrPro: 1.395 ± 0.018
1.315TyrGln: 1.315 ± 0.017
1.453TyrArg: 1.453 ± 0.014
2.043TyrSer: 2.043 ± 0.02
1.31TyrThr: 1.31 ± 0.014
1.571TyrVal: 1.571 ± 0.017
0.362TyrTrp: 0.362 ± 0.007
0.977TyrTyr: 0.977 ± 0.014
0.0TyrXaa: 0.0 ± 0.0
Xaa
0.0XaaAla: 0.0 ± 0.0
0.0XaaCys: 0.0 ± 0.0
0.0XaaAsp: 0.0 ± 0.0
0.0XaaGlu: 0.0 ± 0.0
0.0XaaPhe: 0.0 ± 0.0
0.001XaaGly: 0.001 ± 0.0
0.0XaaHis: 0.0 ± 0.0
0.0XaaIle: 0.0 ± 0.0
0.0XaaLys: 0.0 ± 0.0
0.001XaaLeu: 0.001 ± 0.0
0.0XaaMet: 0.0 ± 0.0
0.0XaaAsn: 0.0 ± 0.0
0.001XaaPro: 0.001 ± 0.0
0.001XaaGln: 0.001 ± 0.0
0.0XaaArg: 0.0 ± 0.0
0.001XaaSer: 0.001 ± 0.0
0.0XaaThr: 0.0 ± 0.0
0.0XaaVal: 0.0 ± 0.0
0.0XaaTrp: 0.0 ± 0.0
0.0XaaTyr: 0.0 ± 0.0
0.02XaaXaa: 0.02 ± 0.004
Statistics based on 15551 proteins (8076027 amino acids)

Note: The error has been estimated with the bootstraping (x100) at the protein level

Above dipeptide statistics (among other stats for this proteome) you can download from this CSV file
See this proteome in: uniprot_link
Proteome-pI is available under Creative Commons Attribution-NoDerivs license, for more details see here

Reference: Kozlowski LP. Proteome-pI 2.0: Proteome Isoelectric Point Database Update. Nucleic Acids Res. 2021, doi: 10.1093/nar/gkab944 Contact: Lukasz P. Kozlowski