Amino acid dipepetide frequency for Chlamydia trachomatis (strain D/UW-3/Cx)

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
6.352AlaAla: 6.352 ± 0.204
1.278AlaCys: 1.278 ± 0.06
3.175AlaAsp: 3.175 ± 0.109
4.418AlaGlu: 4.418 ± 0.136
3.69AlaPhe: 3.69 ± 0.106
4.334AlaGly: 4.334 ± 0.145
1.656AlaHis: 1.656 ± 0.062
5.427AlaIle: 5.427 ± 0.136
4.549AlaLys: 4.549 ± 0.114
9.517AlaLeu: 9.517 ± 0.193
1.666AlaMet: 1.666 ± 0.087
2.505AlaAsn: 2.505 ± 0.094
2.697AlaPro: 2.697 ± 0.097
2.915AlaGln: 2.915 ± 0.129
3.505AlaArg: 3.505 ± 0.094
5.725AlaSer: 5.725 ± 0.176
3.857AlaThr: 3.857 ± 0.127
5.042AlaVal: 5.042 ± 0.129
0.679AlaTrp: 0.679 ± 0.052
2.338AlaTyr: 2.338 ± 0.089
0.0AlaXaa: 0.0 ± 0.0
Cys
1.028CysAla: 1.028 ± 0.054
0.474CysCys: 0.474 ± 0.035
0.759CysAsp: 0.759 ± 0.047
0.807CysGlu: 0.807 ± 0.05
0.826CysPhe: 0.826 ± 0.059
1.198CysGly: 1.198 ± 0.053
0.336CysHis: 0.336 ± 0.034
1.035CysIle: 1.035 ± 0.065
0.686CysLys: 0.686 ± 0.056
1.941CysLeu: 1.941 ± 0.094
0.282CysMet: 0.282 ± 0.027
0.541CysAsn: 0.541 ± 0.038
0.682CysPro: 0.682 ± 0.048
0.676CysGln: 0.676 ± 0.05
0.788CysArg: 0.788 ± 0.064
1.743CysSer: 1.743 ± 0.081
0.605CysThr: 0.605 ± 0.045
1.105CysVal: 1.105 ± 0.064
0.195CysTrp: 0.195 ± 0.027
0.551CysTyr: 0.551 ± 0.037
0.0CysXaa: 0.0 ± 0.0
Asp
3.235AspAla: 3.235 ± 0.107
0.657AspCys: 0.657 ± 0.048
1.634AspAsp: 1.634 ± 0.091
2.451AspGlu: 2.451 ± 0.099
2.374AspPhe: 2.374 ± 0.104
2.572AspGly: 2.572 ± 0.131
1.096AspHis: 1.096 ± 0.066
3.091AspIle: 3.091 ± 0.1
2.56AspLys: 2.56 ± 0.089
5.446AspLeu: 5.446 ± 0.126
1.064AspMet: 1.064 ± 0.047
1.506AspAsn: 1.506 ± 0.071
2.569AspPro: 2.569 ± 0.089
1.743AspGln: 1.743 ± 0.06
2.316AspArg: 2.316 ± 0.093
3.437AspSer: 3.437 ± 0.105
2.271AspThr: 2.271 ± 0.092
2.966AspVal: 2.966 ± 0.115
0.525AspTrp: 0.525 ± 0.04
1.733AspTyr: 1.733 ± 0.077
0.0AspXaa: 0.0 ± 0.0
Glu
5.34GluAla: 5.34 ± 0.164
0.676GluCys: 0.676 ± 0.044
3.38GluAsp: 3.38 ± 0.088
6.464GluGlu: 6.464 ± 0.21
2.415GluPhe: 2.415 ± 0.101
4.254GluGly: 4.254 ± 0.141
1.502GluHis: 1.502 ± 0.076
4.574GluIle: 4.574 ± 0.145
4.728GluLys: 4.728 ± 0.155
5.978GluLeu: 5.978 ± 0.199
1.496GluMet: 1.496 ± 0.08
2.816GluAsn: 2.816 ± 0.096
1.771GluPro: 1.771 ± 0.065
3.066GluGln: 3.066 ± 0.116
3.514GluArg: 3.514 ± 0.119
4.193GluSer: 4.193 ± 0.119
3.524GluThr: 3.524 ± 0.118
4.027GluVal: 4.027 ± 0.133
0.573GluTrp: 0.573 ± 0.049
1.836GluTyr: 1.836 ± 0.094
0.0GluXaa: 0.0 ± 0.0
Phe
3.383PheAla: 3.383 ± 0.122
1.176PheCys: 1.176 ± 0.056
2.06PheAsp: 2.06 ± 0.074
2.079PheGlu: 2.079 ± 0.094
3.046PhePhe: 3.046 ± 0.097
2.992PheGly: 2.992 ± 0.101
1.019PheHis: 1.019 ± 0.058
2.899PheIle: 2.899 ± 0.1
1.813PheLys: 1.813 ± 0.088
6.272PheLeu: 6.272 ± 0.156
0.794PheMet: 0.794 ± 0.05
1.416PheAsn: 1.416 ± 0.064
2.704PhePro: 2.704 ± 0.11
1.647PheGln: 1.647 ± 0.073
1.983PheArg: 1.983 ± 0.092
5.744PheSer: 5.744 ± 0.164
2.005PheThr: 2.005 ± 0.08
3.037PheVal: 3.037 ± 0.111
0.509PheTrp: 0.509 ± 0.049
1.717PheTyr: 1.717 ± 0.079
0.0PheXaa: 0.0 ± 0.0
Gly
5.106GlyAla: 5.106 ± 0.198
1.048GlyCys: 1.048 ± 0.057
3.104GlyAsp: 3.104 ± 0.088
4.177GlyGlu: 4.177 ± 0.117
3.178GlyPhe: 3.178 ± 0.124
4.747GlyGly: 4.747 ± 0.227
1.227GlyHis: 1.227 ± 0.078
5.061GlyIle: 5.061 ± 0.128
4.129GlyLys: 4.129 ± 0.122
6.083GlyLeu: 6.083 ± 0.156
1.72GlyMet: 1.72 ± 0.077
2.441GlyAsn: 2.441 ± 0.096
1.695GlyPro: 1.695 ± 0.079
1.88GlyGln: 1.88 ± 0.079
2.716GlyArg: 2.716 ± 0.125
4.731GlySer: 4.731 ± 0.152
3.04GlyThr: 3.04 ± 0.127
4.674GlyVal: 4.674 ± 0.157
0.708GlyTrp: 0.708 ± 0.059
1.999GlyTyr: 1.999 ± 0.071
0.0GlyXaa: 0.0 ± 0.0
His
1.624HisAla: 1.624 ± 0.071
0.407HisCys: 0.407 ± 0.038
0.884HisAsp: 0.884 ± 0.053
1.073HisGlu: 1.073 ± 0.057
1.073HisPhe: 1.073 ± 0.05
1.294HisGly: 1.294 ± 0.067
0.615HisHis: 0.615 ± 0.045
1.695HisIle: 1.695 ± 0.085
1.278HisLys: 1.278 ± 0.075
2.652HisLeu: 2.652 ± 0.104
0.413HisMet: 0.413 ± 0.028
0.945HisAsn: 0.945 ± 0.054
1.393HisPro: 1.393 ± 0.062
1.064HisGln: 1.064 ± 0.054
1.188HisArg: 1.188 ± 0.054
1.781HisSer: 1.781 ± 0.09
1.176HisThr: 1.176 ± 0.069
1.365HisVal: 1.365 ± 0.069
0.218HisTrp: 0.218 ± 0.027
0.897HisTyr: 0.897 ± 0.059
0.0HisXaa: 0.0 ± 0.0
Ile
5.612IleAla: 5.612 ± 0.184
1.221IleCys: 1.221 ± 0.067
3.287IleAsp: 3.287 ± 0.111
4.059IleGlu: 4.059 ± 0.128
3.447IlePhe: 3.447 ± 0.118
4.28IleGly: 4.28 ± 0.125
1.663IleHis: 1.663 ± 0.082
3.684IleIle: 3.684 ± 0.136
2.998IleLys: 2.998 ± 0.101
7.285IleLeu: 7.285 ± 0.156
1.076IleMet: 1.076 ± 0.055
2.079IleAsn: 2.079 ± 0.089
3.482IlePro: 3.482 ± 0.091
2.793IleGln: 2.793 ± 0.097
3.601IleArg: 3.601 ± 0.099
5.42IleSer: 5.42 ± 0.142
3.543IleThr: 3.543 ± 0.138
4.257IleVal: 4.257 ± 0.124
0.481IleTrp: 0.481 ± 0.036
1.8IleTyr: 1.8 ± 0.09
0.0IleXaa: 0.0 ± 0.0
Lys
4.296LysAla: 4.296 ± 0.113
0.42LysCys: 0.42 ± 0.046
3.011LysAsp: 3.011 ± 0.078
5.519LysGlu: 5.519 ± 0.158
1.608LysPhe: 1.608 ± 0.07
3.562LysGly: 3.562 ± 0.105
1.416LysHis: 1.416 ± 0.063
3.931LysIle: 3.931 ± 0.115
4.965LysLys: 4.965 ± 0.18
5.061LysLeu: 5.061 ± 0.137
1.365LysMet: 1.365 ± 0.069
2.55LysAsn: 2.55 ± 0.088
1.839LysPro: 1.839 ± 0.089
2.813LysGln: 2.813 ± 0.107
3.171LysArg: 3.171 ± 0.105
3.123LysSer: 3.123 ± 0.095
3.729LysThr: 3.729 ± 0.121
3.335LysVal: 3.335 ± 0.115
0.388LysTrp: 0.388 ± 0.035
1.451LysTyr: 1.451 ± 0.064
0.0LysXaa: 0.0 ± 0.0
Leu
8.861LeuAla: 8.861 ± 0.142
2.063LeuCys: 2.063 ± 0.072
4.86LeuAsp: 4.86 ± 0.134
7.172LeuGlu: 7.172 ± 0.19
6.054LeuPhe: 6.054 ± 0.172
7.454LeuGly: 7.454 ± 0.188
2.595LeuHis: 2.595 ± 0.111
6.128LeuIle: 6.128 ± 0.142
5.92LeuLys: 5.92 ± 0.159
12.862LeuLeu: 12.862 ± 0.287
2.034LeuMet: 2.034 ± 0.092
3.437LeuAsn: 3.437 ± 0.122
5.484LeuPro: 5.484 ± 0.136
4.773LeuGln: 4.773 ± 0.107
5.411LeuArg: 5.411 ± 0.146
10.754LeuSer: 10.754 ± 0.256
5.535LeuThr: 5.535 ± 0.139
6.666LeuVal: 6.666 ± 0.164
1.083LeuTrp: 1.083 ± 0.054
3.117LeuTyr: 3.117 ± 0.091
0.0LeuXaa: 0.0 ± 0.0
Met
1.611MetAla: 1.611 ± 0.075
0.25MetCys: 0.25 ± 0.032
0.999MetAsp: 0.999 ± 0.064
1.374MetGlu: 1.374 ± 0.063
0.865MetPhe: 0.865 ± 0.054
1.384MetGly: 1.384 ± 0.072
0.513MetHis: 0.513 ± 0.044
1.406MetIle: 1.406 ± 0.058
1.246MetLys: 1.246 ± 0.067
2.326MetLeu: 2.326 ± 0.079
0.487MetMet: 0.487 ± 0.035
0.775MetAsn: 0.775 ± 0.044
0.83MetPro: 0.83 ± 0.052
0.961MetGln: 0.961 ± 0.063
1.233MetArg: 1.233 ± 0.063
1.329MetSer: 1.329 ± 0.073
1.198MetThr: 1.198 ± 0.055
1.176MetVal: 1.176 ± 0.071
0.128MetTrp: 0.128 ± 0.02
0.423MetTyr: 0.423 ± 0.034
0.0MetXaa: 0.0 ± 0.0
Asn
2.258AsnAla: 2.258 ± 0.092
0.551AsnCys: 0.551 ± 0.039
1.406AsnAsp: 1.406 ± 0.074
1.685AsnGlu: 1.685 ± 0.085
1.663AsnPhe: 1.663 ± 0.091
2.076AsnGly: 2.076 ± 0.094
0.932AsnHis: 0.932 ± 0.052
2.646AsnIle: 2.646 ± 0.094
2.246AsnLys: 2.246 ± 0.084
3.662AsnLeu: 3.662 ± 0.12
0.737AsnMet: 0.737 ± 0.053
1.435AsnAsn: 1.435 ± 0.099
2.13AsnPro: 2.13 ± 0.099
1.547AsnGln: 1.547 ± 0.087
1.848AsnArg: 1.848 ± 0.074
2.537AsnSer: 2.537 ± 0.111
1.954AsnThr: 1.954 ± 0.086
2.159AsnVal: 2.159 ± 0.087
0.324AsnTrp: 0.324 ± 0.032
1.227AsnTyr: 1.227 ± 0.057
0.0AsnXaa: 0.0 ± 0.0
Pro
2.733ProAla: 2.733 ± 0.104
0.644ProCys: 0.644 ± 0.043
1.98ProAsp: 1.98 ± 0.075
3.642ProGlu: 3.642 ± 0.111
2.204ProPhe: 2.204 ± 0.091
2.492ProGly: 2.492 ± 0.1
1.108ProHis: 1.108 ± 0.053
2.893ProIle: 2.893 ± 0.108
2.393ProLys: 2.393 ± 0.089
4.888ProLeu: 4.888 ± 0.149
0.894ProMet: 0.894 ± 0.047
1.496ProAsn: 1.496 ± 0.064
1.707ProPro: 1.707 ± 0.088
1.996ProGln: 1.996 ± 0.091
1.474ProArg: 1.474 ± 0.076
3.857ProSer: 3.857 ± 0.128
2.447ProThr: 2.447 ± 0.108
2.877ProVal: 2.877 ± 0.092
0.474ProTrp: 0.474 ± 0.035
1.496ProTyr: 1.496 ± 0.068
0.0ProXaa: 0.0 ± 0.0
Gln
3.7GlnAla: 3.7 ± 0.138
0.442GlnCys: 0.442 ± 0.035
2.214GlnAsp: 2.214 ± 0.076
4.139GlnGlu: 4.139 ± 0.129
1.339GlnPhe: 1.339 ± 0.061
2.771GlnGly: 2.771 ± 0.115
1.006GlnHis: 1.006 ± 0.048
2.483GlnIle: 2.483 ± 0.129
2.861GlnLys: 2.861 ± 0.099
4.136GlnLeu: 4.136 ± 0.13
0.894GlnMet: 0.894 ± 0.052
1.826GlnAsn: 1.826 ± 0.085
1.393GlnPro: 1.393 ± 0.059
2.258GlnGln: 2.258 ± 0.118
1.993GlnArg: 1.993 ± 0.095
2.537GlnSer: 2.537 ± 0.093
2.073GlnThr: 2.073 ± 0.093
2.39GlnVal: 2.39 ± 0.113
0.362GlnTrp: 0.362 ± 0.035
1.112GlnTyr: 1.112 ± 0.06
0.0GlnXaa: 0.0 ± 0.0
Arg
3.344ArgAla: 3.344 ± 0.093
0.756ArgCys: 0.756 ± 0.05
2.399ArgAsp: 2.399 ± 0.084
3.546ArgGlu: 3.546 ± 0.116
2.406ArgPhe: 2.406 ± 0.081
2.765ArgGly: 2.765 ± 0.11
1.102ArgHis: 1.102 ± 0.053
3.453ArgIle: 3.453 ± 0.106
3.162ArgLys: 3.162 ± 0.101
5.113ArgLeu: 5.113 ± 0.118
1.118ArgMet: 1.118 ± 0.063
1.909ArgAsn: 1.909 ± 0.068
1.573ArgPro: 1.573 ± 0.083
2.028ArgGln: 2.028 ± 0.091
2.492ArgArg: 2.492 ± 0.126
3.428ArgSer: 3.428 ± 0.093
2.14ArgThr: 2.14 ± 0.089
3.293ArgVal: 3.293 ± 0.138
0.535ArgTrp: 0.535 ± 0.047
1.82ArgTyr: 1.82 ± 0.086
0.0ArgXaa: 0.0 ± 0.0
Ser
5.507SerAla: 5.507 ± 0.146
1.557SerCys: 1.557 ± 0.081
3.059SerAsp: 3.059 ± 0.112
4.363SerGlu: 4.363 ± 0.133
4.446SerPhe: 4.446 ± 0.117
5.491SerGly: 5.491 ± 0.184
1.669SerHis: 1.669 ± 0.06
4.911SerIle: 4.911 ± 0.152
3.934SerLys: 3.934 ± 0.106
10.651SerLeu: 10.651 ± 0.186
1.65SerMet: 1.65 ± 0.072
2.201SerAsn: 2.201 ± 0.117
4.254SerPro: 4.254 ± 0.133
3.466SerGln: 3.466 ± 0.11
3.751SerArg: 3.751 ± 0.142
8.156SerSer: 8.156 ± 0.319
3.588SerThr: 3.588 ± 0.128
5.02SerVal: 5.02 ± 0.14
0.849SerTrp: 0.849 ± 0.056
2.652SerTyr: 2.652 ± 0.094
0.0SerXaa: 0.0 ± 0.0
Thr
3.841ThrAla: 3.841 ± 0.151
0.727ThrCys: 0.727 ± 0.055
2.214ThrAsp: 2.214 ± 0.091
3.008ThrGlu: 3.008 ± 0.112
2.294ThrPhe: 2.294 ± 0.072
3.341ThrGly: 3.341 ± 0.124
1.188ThrHis: 1.188 ± 0.071
3.806ThrIle: 3.806 ± 0.135
2.704ThrLys: 2.704 ± 0.103
6.096ThrLeu: 6.096 ± 0.182
0.865ThrMet: 0.865 ± 0.049
1.653ThrAsn: 1.653 ± 0.073
3.091ThrPro: 3.091 ± 0.131
2.044ThrGln: 2.044 ± 0.098
2.028ThrArg: 2.028 ± 0.081
3.876ThrSer: 3.876 ± 0.139
3.187ThrThr: 3.187 ± 0.144
3.396ThrVal: 3.396 ± 0.11
0.477ThrTrp: 0.477 ± 0.039
1.361ThrTyr: 1.361 ± 0.07
0.0ThrXaa: 0.0 ± 0.0
Val
4.664ValAla: 4.664 ± 0.136
1.281ValCys: 1.281 ± 0.055
2.867ValAsp: 2.867 ± 0.126
3.77ValGlu: 3.77 ± 0.093
3.376ValPhe: 3.376 ± 0.125
3.879ValGly: 3.879 ± 0.13
1.339ValHis: 1.339 ± 0.089
4.437ValIle: 4.437 ± 0.136
3.207ValLys: 3.207 ± 0.096
7.624ValLeu: 7.624 ± 0.165
1.217ValMet: 1.217 ± 0.054
2.085ValAsn: 2.085 ± 0.074
2.636ValPro: 2.636 ± 0.094
2.412ValGln: 2.412 ± 0.08
3.062ValArg: 3.062 ± 0.098
5.718ValSer: 5.718 ± 0.141
3.261ValThr: 3.261 ± 0.083
4.885ValVal: 4.885 ± 0.152
0.637ValTrp: 0.637 ± 0.05
1.852ValTyr: 1.852 ± 0.064
0.0ValXaa: 0.0 ± 0.0
Trp
0.557TrpAla: 0.557 ± 0.037
0.157TrpCys: 0.157 ± 0.022
0.487TrpAsp: 0.487 ± 0.034
0.718TrpGlu: 0.718 ± 0.047
0.426TrpPhe: 0.426 ± 0.045
0.711TrpGly: 0.711 ± 0.047
0.221TrpHis: 0.221 ± 0.022
0.73TrpIle: 0.73 ± 0.048
0.653TrpLys: 0.653 ± 0.039
1.137TrpLeu: 1.137 ± 0.083
0.243TrpMet: 0.243 ± 0.033
0.375TrpAsn: 0.375 ± 0.036
0.247TrpPro: 0.247 ± 0.032
0.346TrpGln: 0.346 ± 0.03
0.493TrpArg: 0.493 ± 0.046
0.593TrpSer: 0.593 ± 0.05
0.436TrpThr: 0.436 ± 0.036
0.618TrpVal: 0.618 ± 0.052
0.135TrpTrp: 0.135 ± 0.024
0.275TrpTyr: 0.275 ± 0.035
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.271TyrAla: 2.271 ± 0.087
0.477TyrCys: 0.477 ± 0.041
1.467TyrAsp: 1.467 ± 0.068
1.663TyrGlu: 1.663 ± 0.072
1.563TyrPhe: 1.563 ± 0.066
1.868TyrGly: 1.868 ± 0.08
0.833TyrHis: 0.833 ± 0.058
1.778TyrIle: 1.778 ± 0.084
1.522TyrLys: 1.522 ± 0.077
3.533TyrLeu: 3.533 ± 0.116
0.497TyrMet: 0.497 ± 0.04
1.031TyrAsn: 1.031 ± 0.054
1.515TyrPro: 1.515 ± 0.079
1.499TyrGln: 1.499 ± 0.071
1.816TyrArg: 1.816 ± 0.086
2.492TyrSer: 2.492 ± 0.093
1.627TyrThr: 1.627 ± 0.062
1.925TyrVal: 1.925 ± 0.073
0.279TyrTrp: 0.279 ± 0.026
1.022TyrTyr: 1.022 ± 0.066
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 895 proteins (312168 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