Amino acid dipepetide frequency for Calothrix sp. PCC 7507

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
7.863AlaAla: 7.863 ± 0.096
0.772AlaCys: 0.772 ± 0.023
4.156AlaAsp: 4.156 ± 0.057
5.266AlaGlu: 5.266 ± 0.064
2.958AlaPhe: 2.958 ± 0.039
5.465AlaGly: 5.465 ± 0.06
1.317AlaHis: 1.317 ± 0.027
7.056AlaIle: 7.056 ± 0.079
4.312AlaLys: 4.312 ± 0.063
8.766AlaLeu: 8.766 ± 0.091
1.545AlaMet: 1.545 ± 0.029
3.57AlaAsn: 3.57 ± 0.062
2.894AlaPro: 2.894 ± 0.046
4.265AlaGln: 4.265 ± 0.059
3.559AlaArg: 3.559 ± 0.053
4.988AlaSer: 4.988 ± 0.052
4.87AlaThr: 4.87 ± 0.056
5.704AlaVal: 5.704 ± 0.056
1.056AlaTrp: 1.056 ± 0.027
2.34AlaTyr: 2.34 ± 0.044
0.0AlaXaa: 0.0 ± 0.0
Cys
0.634CysAla: 0.634 ± 0.02
0.157CysCys: 0.157 ± 0.011
0.557CysAsp: 0.557 ± 0.02
0.494CysGlu: 0.494 ± 0.02
0.381CysPhe: 0.381 ± 0.015
0.74CysGly: 0.74 ± 0.023
0.26CysHis: 0.26 ± 0.012
0.596CysIle: 0.596 ± 0.02
0.311CysLys: 0.311 ± 0.013
1.088CysLeu: 1.088 ± 0.03
0.158CysMet: 0.158 ± 0.01
0.384CysAsn: 0.384 ± 0.014
0.516CysPro: 0.516 ± 0.017
0.587CysGln: 0.587 ± 0.017
0.462CysArg: 0.462 ± 0.015
0.61CysSer: 0.61 ± 0.022
0.44CysThr: 0.44 ± 0.015
0.54CysVal: 0.54 ± 0.017
0.138CysTrp: 0.138 ± 0.009
0.344CysTyr: 0.344 ± 0.015
0.0CysXaa: 0.0 ± 0.0
Asp
3.777AspAla: 3.777 ± 0.052
0.513AspCys: 0.513 ± 0.018
2.267AspAsp: 2.267 ± 0.043
2.948AspGlu: 2.948 ± 0.049
2.332AspPhe: 2.332 ± 0.037
3.19AspGly: 3.19 ± 0.061
0.743AspHis: 0.743 ± 0.022
3.487AspIle: 3.487 ± 0.048
2.283AspLys: 2.283 ± 0.043
5.52AspLeu: 5.52 ± 0.057
0.723AspMet: 0.723 ± 0.021
1.967AspAsn: 1.967 ± 0.038
2.189AspPro: 2.189 ± 0.038
1.79AspGln: 1.79 ± 0.031
3.046AspArg: 3.046 ± 0.044
2.881AspSer: 2.881 ± 0.045
2.501AspThr: 2.501 ± 0.04
3.13AspVal: 3.13 ± 0.042
0.924AspTrp: 0.924 ± 0.025
1.882AspTyr: 1.882 ± 0.034
0.0AspXaa: 0.0 ± 0.0
Glu
5.197GluAla: 5.197 ± 0.056
0.437GluCys: 0.437 ± 0.016
2.582GluAsp: 2.582 ± 0.047
3.757GluGlu: 3.757 ± 0.059
2.494GluPhe: 2.494 ± 0.038
3.025GluGly: 3.025 ± 0.043
1.013GluHis: 1.013 ± 0.027
5.03GluIle: 5.03 ± 0.054
3.514GluLys: 3.514 ± 0.054
6.907GluLeu: 6.907 ± 0.081
1.274GluMet: 1.274 ± 0.027
2.721GluAsn: 2.721 ± 0.04
2.296GluPro: 2.296 ± 0.038
3.621GluGln: 3.621 ± 0.051
3.302GluArg: 3.302 ± 0.053
3.349GluSer: 3.349 ± 0.046
3.404GluThr: 3.404 ± 0.044
4.265GluVal: 4.265 ± 0.059
0.797GluTrp: 0.797 ± 0.021
1.886GluTyr: 1.886 ± 0.03
0.0GluXaa: 0.0 ± 0.0
Phe
3.183PheAla: 3.183 ± 0.048
0.497PheCys: 0.497 ± 0.017
2.157PheAsp: 2.157 ± 0.034
2.054PheGlu: 2.054 ± 0.036
1.703PhePhe: 1.703 ± 0.034
2.854PheGly: 2.854 ± 0.043
0.781PheHis: 0.781 ± 0.025
2.48PheIle: 2.48 ± 0.04
1.523PheLys: 1.523 ± 0.031
4.204PheLeu: 4.204 ± 0.054
0.667PheMet: 0.667 ± 0.023
1.752PheAsn: 1.752 ± 0.037
1.856PhePro: 1.856 ± 0.035
1.891PheGln: 1.891 ± 0.033
1.782PheArg: 1.782 ± 0.03
2.989PheSer: 2.989 ± 0.042
2.346PheThr: 2.346 ± 0.043
2.517PheVal: 2.517 ± 0.041
0.711PheTrp: 0.711 ± 0.023
1.412PheTyr: 1.412 ± 0.029
0.0PheXaa: 0.0 ± 0.0
Gly
4.726GlyAla: 4.726 ± 0.063
0.728GlyCys: 0.728 ± 0.021
3.323GlyAsp: 3.323 ± 0.051
4.019GlyGlu: 4.019 ± 0.051
2.903GlyPhe: 2.903 ± 0.043
4.677GlyGly: 4.677 ± 0.063
1.178GlyHis: 1.178 ± 0.033
5.088GlyIle: 5.088 ± 0.065
4.161GlyLys: 4.161 ± 0.052
6.905GlyLeu: 6.905 ± 0.061
1.367GlyMet: 1.367 ± 0.026
3.039GlyAsn: 3.039 ± 0.063
1.264GlyPro: 1.264 ± 0.029
2.893GlyGln: 2.893 ± 0.044
3.183GlyArg: 3.183 ± 0.052
4.05GlySer: 4.05 ± 0.051
3.818GlyThr: 3.818 ± 0.066
4.819GlyVal: 4.819 ± 0.053
1.109GlyTrp: 1.109 ± 0.027
2.371GlyTyr: 2.371 ± 0.039
0.0GlyXaa: 0.0 ± 0.0
His
1.115HisAla: 1.115 ± 0.029
0.236HisCys: 0.236 ± 0.011
0.776HisAsp: 0.776 ± 0.021
0.929HisGlu: 0.929 ± 0.024
0.792HisPhe: 0.792 ± 0.021
1.101HisGly: 1.101 ± 0.029
0.567HisHis: 0.567 ± 0.022
1.135HisIle: 1.135 ± 0.027
0.81HisLys: 0.81 ± 0.025
2.282HisLeu: 2.282 ± 0.04
0.243HisMet: 0.243 ± 0.012
0.78HisAsn: 0.78 ± 0.019
1.364HisPro: 1.364 ± 0.031
1.208HisGln: 1.208 ± 0.029
1.083HisArg: 1.083 ± 0.025
1.181HisSer: 1.181 ± 0.028
0.968HisThr: 0.968 ± 0.026
0.875HisVal: 0.875 ± 0.025
0.374HisTrp: 0.374 ± 0.012
0.671HisTyr: 0.671 ± 0.016
0.0HisXaa: 0.0 ± 0.0
Ile
7.44IleAla: 7.44 ± 0.079
0.736IleCys: 0.736 ± 0.018
3.658IleAsp: 3.658 ± 0.047
4.119IleGlu: 4.119 ± 0.057
2.697IlePhe: 2.697 ± 0.045
4.414IleGly: 4.414 ± 0.062
1.316IleHis: 1.316 ± 0.028
3.933IleIle: 3.933 ± 0.052
3.261IleLys: 3.261 ± 0.039
7.047IleLeu: 7.047 ± 0.075
0.888IleMet: 0.888 ± 0.022
3.214IleAsn: 3.214 ± 0.044
3.733IlePro: 3.733 ± 0.045
3.262IleGln: 3.262 ± 0.043
3.103IleArg: 3.103 ± 0.044
4.674IleSer: 4.674 ± 0.06
3.908IleThr: 3.908 ± 0.051
4.322IleVal: 4.322 ± 0.052
0.923IleTrp: 0.923 ± 0.024
2.054IleTyr: 2.054 ± 0.034
0.0IleXaa: 0.0 ± 0.0
Lys
4.101LysAla: 4.101 ± 0.061
0.343LysCys: 0.343 ± 0.015
2.149LysAsp: 2.149 ± 0.041
2.665LysGlu: 2.665 ± 0.045
1.867LysPhe: 1.867 ± 0.038
2.63LysGly: 2.63 ± 0.035
0.82LysHis: 0.82 ± 0.022
3.809LysIle: 3.809 ± 0.048
2.381LysLys: 2.381 ± 0.037
5.614LysLeu: 5.614 ± 0.062
0.951LysMet: 0.951 ± 0.023
2.222LysAsn: 2.222 ± 0.036
2.515LysPro: 2.515 ± 0.045
2.792LysGln: 2.792 ± 0.039
2.318LysArg: 2.318 ± 0.039
3.181LysSer: 3.181 ± 0.048
2.962LysThr: 2.962 ± 0.041
3.175LysVal: 3.175 ± 0.044
0.559LysTrp: 0.559 ± 0.02
1.594LysTyr: 1.594 ± 0.03
0.0LysXaa: 0.0 ± 0.0
Leu
9.807LeuAla: 9.807 ± 0.093
0.972LeuCys: 0.972 ± 0.026
5.189LeuAsp: 5.189 ± 0.061
7.108LeuGlu: 7.108 ± 0.08
3.837LeuPhe: 3.837 ± 0.056
7.667LeuGly: 7.667 ± 0.069
1.944LeuHis: 1.944 ± 0.035
6.885LeuIle: 6.885 ± 0.075
5.561LeuLys: 5.561 ± 0.069
11.545LeuLeu: 11.545 ± 0.107
2.022LeuMet: 2.022 ± 0.034
4.677LeuAsn: 4.677 ± 0.056
5.827LeuPro: 5.827 ± 0.055
6.225LeuGln: 6.225 ± 0.078
5.482LeuArg: 5.482 ± 0.061
7.615LeuSer: 7.615 ± 0.096
6.522LeuThr: 6.522 ± 0.065
7.416LeuVal: 7.416 ± 0.075
1.462LeuTrp: 1.462 ± 0.039
2.785LeuTyr: 2.785 ± 0.041
0.0LeuXaa: 0.0 ± 0.0
Met
1.526MetAla: 1.526 ± 0.032
0.115MetCys: 0.115 ± 0.009
0.663MetAsp: 0.663 ± 0.021
0.904MetGlu: 0.904 ± 0.024
0.538MetPhe: 0.538 ± 0.017
1.266MetGly: 1.266 ± 0.029
0.32MetHis: 0.32 ± 0.013
1.032MetIle: 1.032 ± 0.027
0.884MetLys: 0.884 ± 0.022
1.848MetLeu: 1.848 ± 0.036
0.392MetMet: 0.392 ± 0.019
0.812MetAsn: 0.812 ± 0.023
0.923MetPro: 0.923 ± 0.023
0.946MetGln: 0.946 ± 0.022
0.998MetArg: 0.998 ± 0.026
1.321MetSer: 1.321 ± 0.03
1.351MetThr: 1.351 ± 0.031
1.177MetVal: 1.177 ± 0.026
0.166MetTrp: 0.166 ± 0.009
0.357MetTyr: 0.357 ± 0.014
0.0MetXaa: 0.0 ± 0.0
Asn
3.056AsnAla: 3.056 ± 0.054
0.47AsnCys: 0.47 ± 0.017
1.628AsnAsp: 1.628 ± 0.03
1.815AsnGlu: 1.815 ± 0.03
1.945AsnPhe: 1.945 ± 0.036
2.616AsnGly: 2.616 ± 0.05
0.876AsnHis: 0.876 ± 0.024
2.955AsnIle: 2.955 ± 0.047
1.769AsnLys: 1.769 ± 0.037
5.717AsnLeu: 5.717 ± 0.08
0.609AsnMet: 0.609 ± 0.016
2.099AsnAsn: 2.099 ± 0.042
2.935AsnPro: 2.935 ± 0.046
2.807AsnGln: 2.807 ± 0.042
2.315AsnArg: 2.315 ± 0.042
3.226AsnSer: 3.226 ± 0.053
2.365AsnThr: 2.365 ± 0.045
2.265AsnVal: 2.265 ± 0.033
0.775AsnTrp: 0.775 ± 0.019
1.549AsnTyr: 1.549 ± 0.032
0.0AsnXaa: 0.0 ± 0.0
Pro
3.368ProAla: 3.368 ± 0.048
0.32ProCys: 0.32 ± 0.014
2.962ProAsp: 2.962 ± 0.044
3.891ProGlu: 3.891 ± 0.043
1.701ProPhe: 1.701 ± 0.035
3.092ProGly: 3.092 ± 0.047
0.953ProHis: 0.953 ± 0.024
3.103ProIle: 3.103 ± 0.039
2.221ProLys: 2.221 ± 0.039
4.657ProLeu: 4.657 ± 0.057
0.704ProMet: 0.704 ± 0.021
2.28ProAsn: 2.28 ± 0.04
2.31ProPro: 2.31 ± 0.054
2.753ProGln: 2.753 ± 0.046
1.743ProArg: 1.743 ± 0.033
2.928ProSer: 2.928 ± 0.045
2.99ProThr: 2.99 ± 0.048
3.283ProVal: 3.283 ± 0.045
0.575ProTrp: 0.575 ± 0.02
1.314ProTyr: 1.314 ± 0.026
0.0ProXaa: 0.0 ± 0.0
Gln
4.947GlnAla: 4.947 ± 0.059
0.358GlnCys: 0.358 ± 0.015
2.191GlnAsp: 2.191 ± 0.033
3.654GlnGlu: 3.654 ± 0.052
1.83GlnPhe: 1.83 ± 0.034
3.347GlnGly: 3.347 ± 0.042
0.929GlnHis: 0.929 ± 0.023
3.949GlnIle: 3.949 ± 0.051
2.936GlnLys: 2.936 ± 0.043
6.216GlnLeu: 6.216 ± 0.068
1.099GlnMet: 1.099 ± 0.027
2.248GlnAsn: 2.248 ± 0.035
2.752GlnPro: 2.752 ± 0.044
4.127GlnGln: 4.127 ± 0.07
3.034GlnArg: 3.034 ± 0.045
3.125GlnSer: 3.125 ± 0.046
3.067GlnThr: 3.067 ± 0.05
3.924GlnVal: 3.924 ± 0.054
0.645GlnTrp: 0.645 ± 0.022
1.313GlnTyr: 1.313 ± 0.03
0.0GlnXaa: 0.0 ± 0.0
Arg
3.21ArgAla: 3.21 ± 0.05
0.497ArgCys: 0.497 ± 0.017
2.53ArgAsp: 2.53 ± 0.047
3.246ArgGlu: 3.246 ± 0.047
2.124ArgPhe: 2.124 ± 0.029
2.93ArgGly: 2.93 ± 0.037
1.026ArgHis: 1.026 ± 0.027
3.277ArgIle: 3.277 ± 0.046
2.158ArgLys: 2.158 ± 0.037
5.998ArgLeu: 5.998 ± 0.07
0.914ArgMet: 0.914 ± 0.02
2.083ArgAsn: 2.083 ± 0.037
1.999ArgPro: 1.999 ± 0.04
3.341ArgGln: 3.341 ± 0.052
3.089ArgArg: 3.089 ± 0.053
3.177ArgSer: 3.177 ± 0.045
2.52ArgThr: 2.52 ± 0.043
3.398ArgVal: 3.398 ± 0.047
0.812ArgTrp: 0.812 ± 0.021
1.862ArgTyr: 1.862 ± 0.034
0.0ArgXaa: 0.0 ± 0.0
Ser
4.742SerAla: 4.742 ± 0.056
0.584SerCys: 0.584 ± 0.02
3.16SerAsp: 3.16 ± 0.045
3.691SerGlu: 3.691 ± 0.057
2.551SerPhe: 2.551 ± 0.041
4.664SerGly: 4.664 ± 0.061
1.339SerHis: 1.339 ± 0.029
3.812SerIle: 3.812 ± 0.051
2.639SerLys: 2.639 ± 0.039
7.588SerLeu: 7.588 ± 0.071
1.105SerMet: 1.105 ± 0.027
2.676SerAsn: 2.676 ± 0.043
3.603SerPro: 3.603 ± 0.052
3.876SerGln: 3.876 ± 0.05
3.265SerArg: 3.265 ± 0.048
4.547SerSer: 4.547 ± 0.063
3.534SerThr: 3.534 ± 0.048
4.146SerVal: 4.146 ± 0.049
0.958SerTrp: 0.958 ± 0.023
1.874SerTyr: 1.874 ± 0.035
0.0SerXaa: 0.0 ± 0.0
Thr
4.989ThrAla: 4.989 ± 0.056
0.48ThrCys: 0.48 ± 0.017
2.676ThrAsp: 2.676 ± 0.041
3.322ThrGlu: 3.322 ± 0.043
2.162ThrPhe: 2.162 ± 0.037
4.301ThrGly: 4.301 ± 0.059
1.064ThrHis: 1.064 ± 0.025
3.836ThrIle: 3.836 ± 0.054
2.546ThrLys: 2.546 ± 0.04
6.36ThrLeu: 6.36 ± 0.064
0.768ThrMet: 0.768 ± 0.019
2.393ThrAsn: 2.393 ± 0.043
3.479ThrPro: 3.479 ± 0.052
2.976ThrGln: 2.976 ± 0.046
2.415ThrArg: 2.415 ± 0.037
3.524ThrSer: 3.524 ± 0.048
3.579ThrThr: 3.579 ± 0.052
4.037ThrVal: 4.037 ± 0.047
0.741ThrTrp: 0.741 ± 0.022
1.63ThrTyr: 1.63 ± 0.029
0.0ThrXaa: 0.0 ± 0.0
Val
5.914ValAla: 5.914 ± 0.058
0.638ValCys: 0.638 ± 0.019
3.384ValAsp: 3.384 ± 0.048
4.295ValGlu: 4.295 ± 0.05
2.583ValPhe: 2.583 ± 0.039
4.599ValGly: 4.599 ± 0.066
1.012ValHis: 1.012 ± 0.028
4.589ValIle: 4.589 ± 0.06
3.516ValLys: 3.516 ± 0.046
6.687ValLeu: 6.687 ± 0.072
1.367ValMet: 1.367 ± 0.026
3.06ValAsn: 3.06 ± 0.044
2.809ValPro: 2.809 ± 0.036
2.935ValGln: 2.935 ± 0.046
3.151ValArg: 3.151 ± 0.037
4.262ValSer: 4.262 ± 0.054
3.962ValThr: 3.962 ± 0.051
4.923ValVal: 4.923 ± 0.064
0.882ValTrp: 0.882 ± 0.026
1.931ValTyr: 1.931 ± 0.03
0.0ValXaa: 0.0 ± 0.0
Trp
0.913TrpAla: 0.913 ± 0.027
0.159TrpCys: 0.159 ± 0.009
0.632TrpAsp: 0.632 ± 0.021
0.971TrpGlu: 0.971 ± 0.022
0.601TrpPhe: 0.601 ± 0.019
1.002TrpGly: 1.002 ± 0.024
0.347TrpHis: 0.347 ± 0.014
0.858TrpIle: 0.858 ± 0.024
0.591TrpLys: 0.591 ± 0.02
1.933TrpLeu: 1.933 ± 0.034
0.302TrpMet: 0.302 ± 0.014
0.61TrpAsn: 0.61 ± 0.02
0.281TrpPro: 0.281 ± 0.013
1.239TrpGln: 1.239 ± 0.028
0.89TrpArg: 0.89 ± 0.022
0.8TrpSer: 0.8 ± 0.021
0.625TrpThr: 0.625 ± 0.021
0.951TrpVal: 0.951 ± 0.023
0.248TrpTrp: 0.248 ± 0.011
0.439TrpTyr: 0.439 ± 0.017
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.215TyrAla: 2.215 ± 0.033
0.382TyrCys: 0.382 ± 0.015
1.454TyrAsp: 1.454 ± 0.025
1.726TyrGlu: 1.726 ± 0.031
1.361TyrPhe: 1.361 ± 0.03
2.043TyrGly: 2.043 ± 0.033
0.682TyrHis: 0.682 ± 0.019
1.792TyrIle: 1.792 ± 0.033
1.272TyrLys: 1.272 ± 0.027
3.665TyrLeu: 3.665 ± 0.052
0.439TyrMet: 0.439 ± 0.015
1.204TyrAsn: 1.204 ± 0.027
1.601TyrPro: 1.601 ± 0.032
2.158TyrGln: 2.158 ± 0.04
1.972TyrArg: 1.972 ± 0.033
1.926TyrSer: 1.926 ± 0.033
1.545TyrThr: 1.545 ± 0.029
1.631TyrVal: 1.631 ± 0.029
0.539TyrTrp: 0.539 ± 0.019
1.058TyrTyr: 1.058 ± 0.03
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
0.0XaaGly: 0.0 ± 0.0
0.0XaaHis: 0.0 ± 0.0
0.0XaaIle: 0.0 ± 0.0
0.0XaaLys: 0.0 ± 0.0
0.0XaaLeu: 0.0 ± 0.0
0.0XaaMet: 0.0 ± 0.0
0.0XaaAsn: 0.0 ± 0.0
0.0XaaPro: 0.0 ± 0.0
0.0XaaGln: 0.0 ± 0.0
0.0XaaArg: 0.0 ± 0.0
0.0XaaSer: 0.0 ± 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
0.0XaaXaa: 0.0 ± 0.0
Statistics based on 5924 proteins (1845511 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