3K71: Integrin alphaX beta2 ectodomain

Structure of integrin alphaX beta2 ectodomain. Determined by X-ray diffraction at 3.95 Å resolution. Released 12 Jan 2010.

Method
X-ray diffraction
Resolution
3.95 Å
Organism
Homo sapiens
Chains
8
Atoms
50,191
Mol. weight
797.56 kDa
Ligands
MG, CA, NAG
Released
12 Jan 2010

Explore 3K71 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

3K71 contains 144 α-helices and 515 β-strands across 8 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 6 helices, 79 β-strands

ElementResiduesLengthSheet
β-strand311
β-strand9-1132
β-strand21-2443
β-strand29-3353
β-strand47-5153
β-strand56-5943
β-strand76-8054
β-strand85-9064
β-strand94-9525
β-strand102-10325
β-strand106-11054
β-strand11614
β-strand33215
β-strand33916
β-strand347-35046
β-strand35817
β-strand359-36246
α-helix368-3692
β-strand37216
β-strand38617
β-strand390-39128
β-strand400-40568
α-helix408-4103
β-strand413-41868
β-strand426-43058
β-strand443-44649
β-strand456-46059
β-strand471110
β-strand473-47759
β-strand502110
β-strand505-510611
β-strand519-523511
β-strand533112
β-strand534-538511
β-strand539113
β-strand545113
β-strand551111
β-strand554112
β-strand565-57392
β-strand582-58762
β-strand591-59552
β-strand59611
β-strand599114
β-strand602-608715
β-strand629-6391115
β-strand654-662916
β-strand672-673215
β-strand680-687816
β-strand693-700815
α-helix7101
β-strand711-717716
β-strand733114
β-strand741-746616
β-strand764-767417
β-strand775-776218
β-strand781-788817
β-strand795119
β-strand799-805720
β-strand808-811417
β-strand828-833620
β-strand839-845720
β-strand851119
β-strand857-865917
β-strand874-877421
β-strand878-882520
β-strand883122
β-strand886122
β-strand896-900521
β-strand902-905418
β-strand907-911523
β-strand932-940923
β-strand948-953624
β-strand964125
β-strand968-970323
β-strand979-984624
α-helix991-9977
β-strand1000-1001224
β-strand1008-1015824
β-strand1025-1030623
β-strand1032125
α-helix1035-10373
β-strand1046-1054924
β-strand1060-1062318
α-helix1068-10703
β-strand1071-1077724
Chain B: 27 helices, 46 β-strands
ElementResiduesLengthSheet
α-helix12-154
β-strand22-24326
α-helix36-394
β-strand40-41226
α-helix43-497
β-strand56-57226
β-strand62127
β-strand65128
β-strand77129
β-strand81128
β-strand83-85327
α-helix901
β-strand91-97729
β-strand107-112630
α-helix118-1225
α-helix131-1366
β-strand144-149630
α-helix176-1794
β-strand183-189730
α-helix193-2019
β-strand212131
α-helix214-2218
α-helix225-2284
β-strand236-241630
β-strand245131
α-helix250-2545
β-strand270130
α-helix274-2763
α-helix278-2814
α-helix282-2843
α-helix285-2917
β-strand295130
β-strand298-300330
α-helix302-3043
α-helix309-3146
β-strand320-322330
α-helix332-3354
α-helix337-3415
β-strand356-359429
β-strand362132
β-strand370132
β-strand387-395929
α-helix399-4002
β-strand402-405427
α-helix407-4082
β-strand416-421627
α-helix437-4393
β-strand441-443333
β-strand448-450333
β-strand454-455234
β-strand461-462234
α-helix470-4723
α-helix483-4853
β-strand488-491435
β-strand494-497435
β-strand507-508236
β-strand514-515236
β-strand521-522237
β-strand525-526237
α-helix529-5324
β-strand533-536438
β-strand539-542438
α-helix5431
β-strand561139
β-strand567139
β-strand574140
β-strand579140
α-helix604-6074
β-strand629141
β-strand640-643442
β-strand649-654642
β-strand664141
β-strand665-667342
Chain C: 6 helices, 79 β-strands
ElementResiduesLengthSheet
β-strand3143
β-strand9-11344
β-strand21-24445
β-strand29-33545
β-strand47-51545
β-strand56-59445
β-strand76-80546
β-strand85-90646
β-strand94-95247
β-strand102-103247
β-strand106-110546
β-strand116-117246
β-strand332147
β-strand339148
β-strand347-350448
β-strand358149
β-strand359-362448
α-helix368-3692
β-strand372148
β-strand386149
β-strand390-391250
β-strand400-405650
α-helix408-4103
β-strand413-418650
β-strand426-430550
β-strand443-446451
β-strand456-460551
β-strand471152
β-strand473-477551
β-strand502152
β-strand505-510653
β-strand519-523553
β-strand533154
β-strand534-538553
β-strand539155
β-strand545155
β-strand551153
β-strand554154
β-strand565-573944
β-strand582-587644
β-strand591-595544
β-strand596143
β-strand599156
β-strand602-608757
β-strand629-6391157
β-strand654-662958
β-strand672-673257
β-strand680-687858
β-strand693-700857
α-helix7101
β-strand711-717758
β-strand733156
β-strand741-746658
β-strand764-767459
β-strand775-776260
β-strand781-788859
β-strand795161
β-strand799-805762
β-strand808-811459
β-strand828-833662
β-strand839-845762
β-strand851161
β-strand857-865959
β-strand874-877421
β-strand878-882562
β-strand883163
β-strand886163
β-strand896-900521
β-strand902-905460
β-strand907-911564
β-strand932-940964
β-strand948-953665
β-strand964166
β-strand968-970364
β-strand979-984665
α-helix991-9977
β-strand1000-1001265
β-strand1008-1015865
β-strand1025-1030664
β-strand1032166
α-helix1035-10373
β-strand1046-1054965
β-strand1060-1062360
α-helix1068-10703
β-strand1071-1077765
Chain D: 27 helices, 48 β-strands
ElementResiduesLengthSheet
α-helix12-154
β-strand22-24367
α-helix37-393
β-strand40-41267
α-helix43-497
β-strand56-57267
β-strand62168
β-strand65169
β-strand77170
β-strand81169
β-strand83-85368
α-helix901
β-strand91-97770
β-strand107-112671
α-helix118-1225
α-helix131-1366
β-strand144-149671
α-helix176-1794
β-strand183-189771
α-helix193-2019
β-strand212172
α-helix214-2218
α-helix225-2284
β-strand236-241671
β-strand245172
α-helix250-2545
β-strand270171
α-helix274-2763
α-helix278-2814
α-helix282-2843
α-helix285-2917
β-strand295171
β-strand298-300371
α-helix302-3043
α-helix309-3146
β-strand320-322371
α-helix332-3354
α-helix337-3415
β-strand356-359470
β-strand362173
β-strand370173
β-strand387-395970
α-helix399-4002
β-strand402-405468
α-helix407-4082
β-strand416-421668
α-helix437-4393
β-strand441-443374
β-strand448-450374
β-strand454-455275
β-strand461-462275
α-helix470-4723
α-helix483-4853
β-strand488-491476
β-strand494-497476
β-strand507-508277
β-strand514-515277
β-strand521-522278
β-strand525-526278
α-helix529-5324
β-strand533-536479
β-strand539-542479
α-helix5431
β-strand547180
β-strand553180
β-strand561181
β-strand567181
β-strand574182
β-strand579182
α-helix604-6074
β-strand629183
β-strand640-643484
β-strand649-654684
β-strand664183
β-strand665-667384
Chain E: 6 helices, 79 β-strands
ElementResiduesLengthSheet
β-strand3185
β-strand9-11386
β-strand21-24487
β-strand29-33587
β-strand47-51587
β-strand56-59487
β-strand76-80588
β-strand85-90688
β-strand94-95289
β-strand102-103289
β-strand106-110588
β-strand116188
β-strand332189
β-strand339190
β-strand347-350490
β-strand358191
β-strand359-362490
α-helix368-3692
β-strand370-372390
β-strand386191
β-strand390-391292
β-strand400-405692
α-helix408-4103
β-strand413-418692
β-strand426-430592
β-strand443-446493
β-strand456-460593
β-strand471194
β-strand473-477593
β-strand502194
β-strand505-510695
β-strand519-523595
β-strand533196
β-strand534-538595
β-strand539197
β-strand545197
β-strand551195
β-strand554196
β-strand565-573986
β-strand582-587686
β-strand591-595586
β-strand596185
β-strand599198
β-strand602-608799
β-strand629-6391199
β-strand654-6629100
β-strand672-673299
β-strand680-6878100
β-strand693-700899
α-helix7101
β-strand711-7177100
β-strand733198
β-strand741-7466100
β-strand764-7674101
β-strand775-7762102
β-strand781-7888101
β-strand7951103
β-strand799-8057104
β-strand808-8114101
β-strand828-8336104
β-strand839-8457104
β-strand8511103
β-strand857-8659101
β-strand874-8774105
β-strand878-8825104
β-strand8831106
β-strand8861106
β-strand896-9005105
β-strand902-9054102
β-strand907-9115107
β-strand932-9409107
β-strand948-9536108
β-strand9641109
β-strand968-9703107
β-strand979-9846108
α-helix991-9977
β-strand1000-10012108
β-strand1008-10158108
β-strand1025-10306107
β-strand10321109
α-helix1035-10373
β-strand1046-10549108
β-strand1060-10623102
α-helix1068-10703
β-strand1071-10777108
Chain F: 27 helices, 48 β-strands
ElementResiduesLengthSheet
α-helix12-154
β-strand22-243110
α-helix37-393
β-strand40-412110
α-helix43-497
β-strand56-572110
β-strand621111
β-strand651112
β-strand771113
β-strand811112
β-strand83-853111
α-helix901
β-strand91-977113
β-strand107-1126114
α-helix118-1225
α-helix131-1366
β-strand144-1496114
α-helix176-1794
β-strand183-1897114
α-helix193-2019
β-strand2121115
α-helix214-2218
α-helix225-2284
β-strand236-2416114
β-strand2451115
α-helix250-2545
β-strand2701114
α-helix274-2763
α-helix278-2814
α-helix282-2843
α-helix285-2917
β-strand2951114
β-strand298-3003114
α-helix302-3043
α-helix309-3146
β-strand320-3223114
α-helix331-3333
α-helix337-3415
β-strand356-3594113
β-strand3621116
β-strand3701116
β-strand387-3959113
α-helix399-4002
β-strand402-4054111
α-helix407-4082
β-strand416-4216111
α-helix437-4393
β-strand441-4433117
β-strand448-4503117
β-strand4551118
β-strand4611118
α-helix470-4723
α-helix483-4853
β-strand488-4914119
β-strand494-4974119
β-strand507-5082120
β-strand514-5152120
β-strand521-5222121
β-strand525-5262121
α-helix529-5324
β-strand533-5364122
β-strand539-5424122
α-helix5431
β-strand5471123
β-strand5531123
β-strand5611124
β-strand5671124
β-strand5741125
β-strand5791125
α-helix604-6074
β-strand6291126
β-strand640-6434127
β-strand649-6546127
β-strand6641126
β-strand665-6673127
Chain G: 18 helices, 90 β-strands
ElementResiduesLengthSheet
β-strand31128
β-strand9-113129
β-strand21-244130
β-strand29-335130
β-strand47-515130
β-strand56-594130
β-strand76-805131
β-strand85-906131
β-strand94-952132
β-strand102-1032132
β-strand106-1105131
β-strand1161131
α-helix125-1262
β-strand1311133
β-strand132-1387134
α-helix146-16015
β-strand168-1747134
β-strand178-1803134
α-helix185-1884
α-helix194-1963
β-strand2071135
α-helix209-2179
β-strand2321133
β-strand233-2397134
β-strand2441135
α-helix250-25910
β-strand262-2687134
β-strand2691136
α-helix272-2743
α-helix280-2834
α-helix2871
α-helix2891
β-strand2971136
α-helix301-3033
α-helix307-3159
β-strand3321132
β-strand3391137
β-strand347-3504137
β-strand3581138
β-strand359-3624137
α-helix368-3692
β-strand370-3723137
β-strand3861138
β-strand390-3912139
β-strand400-4056139
α-helix408-4103
β-strand413-4186139
β-strand426-4305139
β-strand443-4464140
β-strand456-4605140
β-strand4711141
β-strand473-4775140
β-strand5021141
β-strand505-5106142
β-strand519-5235142
β-strand5331143
β-strand534-5385142
β-strand5391144
β-strand5451144
β-strand5511142
β-strand5541143
β-strand565-5739129
β-strand582-5876129
β-strand591-5955129
β-strand5961128
β-strand5991145
β-strand602-6087146
β-strand629-63911146
β-strand654-6629147
β-strand672-6732146
β-strand680-6878147
β-strand693-7008146
α-helix7101
β-strand711-7177147
β-strand7331145
β-strand741-7466147
β-strand764-7674148
β-strand775-7762149
β-strand781-7888148
β-strand7951150
β-strand799-8057151
β-strand808-8114148
β-strand828-8336151
β-strand839-8457151
β-strand8511150
β-strand857-8659148
β-strand874-8774105
β-strand878-8825151
β-strand8831152
β-strand8861152
β-strand896-9005105
β-strand902-9054149
β-strand907-9115153
β-strand932-9409153
β-strand948-9536154
β-strand9641155
β-strand968-9703153
β-strand979-9846154
α-helix991-9977
β-strand1000-10012154
β-strand1008-10158154
β-strand1025-10306153
β-strand10321155
α-helix1035-10373
β-strand1046-10549154
β-strand1060-10623149
α-helix1068-10703
β-strand1071-10777154
Chain H: 27 helices, 46 β-strands
ElementResiduesLengthSheet
α-helix12-154
β-strand22-243156
α-helix37-393
β-strand40-412156
α-helix43-497
β-strand56-572156
β-strand621157
β-strand651158
β-strand771159
β-strand811158
β-strand83-853157
α-helix901
β-strand91-977159
β-strand107-1126160
α-helix118-1225
α-helix131-1366
β-strand144-1496160
α-helix176-1794
β-strand183-1897160
α-helix193-2019
β-strand2121161
α-helix214-2218
α-helix225-2284
β-strand236-2416160
β-strand2451161
α-helix250-2545
β-strand2701160
α-helix274-2763
α-helix278-2814
α-helix282-2843
α-helix285-2917
β-strand2951160
β-strand298-3003160
α-helix302-3043
α-helix309-3146
β-strand320-3223160
α-helix332-3354
α-helix337-3415
β-strand356-3594159
β-strand3621162
β-strand3701162
β-strand387-3959159
α-helix399-4002
β-strand402-4054157
α-helix407-4082
β-strand416-4216157
α-helix437-4393
β-strand441-4433163
β-strand448-4503163
β-strand454-4552164
β-strand461-4622164
α-helix470-4723
α-helix483-4853
β-strand488-4914165
β-strand494-4974165
β-strand507-5082166
β-strand514-5152166
β-strand521-5222167
β-strand525-5262167
α-helix529-5324
β-strand533-5364168
β-strand539-5424168
α-helix5431
β-strand5611169
β-strand5671169
β-strand5741170
β-strand5791170
α-helix604-6074
β-strand6291171
β-strand640-6434172
β-strand649-6546172
β-strand6641171
β-strand665-6673172

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Integrin alpha-XA, C, E, Gprotein1095Homo sapiensP20702 (AlphaFold model)
Integrin beta-2B, D, F, Hprotein687Homo sapiensP05107 (AlphaFold model)
Sequence of entity 1 (A, C, E, G), FASTA
>3K71_1 Integrin alpha-X (chains A, C, E, G)
FNLDTEELTAFRVDSAGFGDSVVQYANSWVVVGAPQKITAANQTGGLYQCGYSTGACEPI
GLQVPPEAVNMSLGLSLASTTSPSQLLACGPTVHHECGRNMYLTGLCFLLGPTQLTQRLP
VSRQECPRQEQDIVFLIDGSGSISSRNFATMMNFVRAVISQFQRPSTQFSLMQFSNKFQT
HFTFEEFRRSSNPLSLLASVHQLQGFTYTATAIQNVVHRLFHASYGARRDAAKILIVITD
GKKEGDSLDYKDVIPMADAAGIIRYAIGVGLAFQNRNSWKELNDIASKPSQEHIFKVEDF
DALKDIQNQLKEKIFAIEGTETTSSSSFELEMAQEGFSAVFTPDGPVLGAVGSFTWSGGA
FLYPPNMSPTFINMSQENVDMRDSYLGYSTELALWKGVQSLVLGAPRYQHTGKAVIFTQV
SRQWRMKAEVTGTQIGSYFGASLCSVDVDSDGSTDLVLIGAPHYYEQTRGGQVSVCPLPR
GWRRWWCDAVLYGEQGHPWGRFGAALTVLGDVNGDKLTDVVIGAPGEEENRGAVYLFHGV
LGPSISPSHSQRIAGSQLSSRLQYFGQALSGGQDLTQDGLVDLAVGARGQVLLLRTRPVL
WVGVSMQFIPAEIPRSAFECREQVVSEQTLVQSNICLYIDKRSKNLLGSRDLQSSVTLDL
ALDPGRLSPRATFQETKNRSLSRVRVLGLKAHCENFNLLLPSCVEDSVTPITLRLNFTLV
GKPLLAFRNLRPMLAADAQRYFTASLPFEKNCGADHICQDNLGISFSFPGLKSLLVGSNL
ELNAEVMVWNDGEDSYGTTITFSHPAGLSYRYVAEGQKQGQLRSLHLTCDSAPVGSQGTW
STSCRINHLIFRGGAQITFLATFDVSPKAVLGDRLLLTANVSSENNTPRTSKTTFQLELP
VKYAVYTVVSSHEQFTKYLNFSESEEKESHVAMHRYQVNNLGQRDLPVSINFWVPVELNQ
EAVWMDVEVSHPQNPSLRCSSEKIAPPASDFLAHIQKNPVLDCSIAGCLRFRCDVPSFSV
QEELDFTLKGNLSFGWVRQILQKKVSVVSVAEITFDTSVYSQLPGQEAFMRAQTTTVLEK
YKVHGCGGLENLYFQ
Sequence of entity 2 (B, D, F, H), FASTA
>3K71_2 Integrin beta-2 (chains B, D, F, H)
QECTKFKVSSCRECIESGPGCTWCQKLNFTGPGDPDSIRCDTRPQLLMRGCAADDIMDPT
SLAETQEDHNGGQKQLSPQKVTLYLRPGQAAAFNVTFRRAKGYPIDLYYLMDLSYSMLDD
LRNVKKLGGDLLRALNEITESGRIGFGSFVDKTVLPFVNTHPDKLRNPCPNKEKECQPPF
AFRHVLKLTNNSNQFQTEVGKQLISGNLDAPEGGLDAMMQVAACPEEIGWRNVTRLLVFA
TDDGFHFAGDGKLGAILTPNDGRCHLEDNLYKRSNEFDYPSVGQLAHKLAENNIQPIFAV
TSRMVKTYEKLTEIIPKSAVGELSEDSSNVVQLIKNAYNKLSSRVFLDHNALPDTLKVTY
DSFCSNGVTHRNQPRGDCDGVQINVPITFQVKVTATECIQEQSFVIRALGFTDIVTVQVL
PQCECRCRDQSRDRSLCHGKGFLECGICRCDTGYIGKNCECQTQGRSSQELEGSCRKDNN
SIICSGLGDCVCGQCLCHTSDVPGKLIYGQYCECDTINCERYNGQVCGGPGRGLCFCGKC
RCHPGFEGSACQCERTTEGCLNPRRVECSGRGRCRCNVCECHSGYQLPLCQECPGCPSPC
GKYISCAECLKFEKGPFGKNCSAACPGLQLSNNPVKGRTCKERDSEGCWVAYTLEQQDGM
DRYLIYVDESRECVAGPDGCGENLYFQ

Ligands and cofactors

IDNameFormulaCopies
MGMagnesium ionMg1
CACalcium ionCa16
NAG2-acetamido-2-deoxy-beta-D-glucopyranoseC8 H15 N O615

Primary citation

Structure of an integrin with an alphaI domain, complement receptor type 4. Xie, C., Zhu, J., Chen, X. et al. EMBO J (2010) 29:666-679. DOI 10.1038/emboj.2009.367 · PubMed

Other PDB entries of the same protein (UniProt P20702 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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