9NMX: TCR156 S32Malpha variant

TCR156 S32Malpha variant bound to HLA A*02:01-PAP. Determined by X-ray diffraction at 2.19 Å resolution. Released 18 Mar 2026.

Method: X-ray diffraction
Resolution: 2.19 Å
Organism: Homo sapiens
Chains: 5
Atoms: 6,986
Mol. weight: 109.89 kDa
Ligands: NAG, MLI
Released: 18 Mar 2026

Explore 9NMX in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9NMX contains 26 α-helices and 73 β-strands across 4 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: 8 helices, 19 β-strands

Element	Residues	Length	Sheet
β-strand	3-12	10	1
α-helix	18-20	3
β-strand	21-28	8	1
β-strand	31-37	7	1
β-strand	46-47	2	1
α-helix	57-85	29
β-strand	94-103	10	1
β-strand	109-118	10	1
β-strand	121-126	6	1
β-strand	133-135	3	1
α-helix	138-149	12
α-helix	152-158	7
α-helix	159-163	5
α-helix	164-174	11
α-helix	176-179	4
β-strand	183	1	2
β-strand	186-192	7	3
β-strand	199-208	10	3
β-strand	209	1	2
β-strand	214-219	6	4
β-strand	222	1	4
β-strand	228-230	3	3
α-helix	231-233	3
β-strand	234-235	2	3
β-strand	241-249	9	3
β-strand	257-262	6	4
β-strand	270-273	4	4

Chain B: 2 helices, 11 β-strands

Element	Residues	Length	Sheet
β-strand	3	1	5
α-helix	4-5	2
β-strand	6-11	6	6
β-strand	21-30	10	6
β-strand	31	1	5
β-strand	36-41	6	7
β-strand	44-46	3	7
β-strand	50-51	2	6
β-strand	55-56	2	6
β-strand	62-70	9	6
β-strand	78-83	6	7
β-strand	91-94	4	7
α-helix	95-96	2

Chain D: 6 helices, 19 β-strands

Element	Residues	Length	Sheet
β-strand	4-6	3	8
α-helix	10	1
β-strand	11-14	4	9
β-strand	19-25	7	8
β-strand	32-38	7	9
α-helix	43-44	2
β-strand	45-50	6	9
β-strand	54-58	5	8
β-strand	61-66	6	8
β-strand	71-76	6	8
α-helix	81-83	3
β-strand	85-92	8	9
β-strand	96-98	3	9
β-strand	102-107	6	9
β-strand	116-121	6	10
β-strand	122	1	11
β-strand	129-134	6	10
α-helix	142-145	4
β-strand	151-152	2	10
α-helix	153-155	3
β-strand	157-160	4	12
α-helix	161-163	3
β-strand	165-168	4	12
β-strand	169-173	5	10
β-strand	195	1	10

Chain E: 10 helices, 24 β-strands

Element	Residues	Length	Sheet
β-strand	5-7	3	13
β-strand	10-14	5	14
β-strand	19-24	6	13
α-helix	25-26	2
β-strand	31-37	7	14
β-strand	43-50	8	14
β-strand	53-57	5	14
β-strand	64-68	5	13
β-strand	74-78	5	13
α-helix	83-85	3
β-strand	87-94	8	14
α-helix	100-101	2
β-strand	102-103	2	14
β-strand	107-112	6	14
α-helix	115-117	3
β-strand	119	1	15
α-helix	120-121	2
β-strand	122-126	5	11
α-helix	127-129	3
α-helix	130-135	6
β-strand	138-148	11	11
β-strand	149	1	15
β-strand	153-159	7	16
β-strand	162-164	3	16
β-strand	168-170	3	11
α-helix	174	1
β-strand	175-176	2	11
β-strand	186-195	10	11
α-helix	196-199	4
β-strand	205-212	8	16
β-strand	215	1	17
α-helix	226-227	2
β-strand	229	1	17
β-strand	231-238	8	16

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
HLA class I histocompatibility antigen, A alpha chain	A	protein	279	Homo sapiens	A5I8L1 (AlphaFold model)
Beta-2-microglobulin	B	protein	100	Homo sapiens	P61769 (AlphaFold model)
Prostatic acid phosphatase	C	protein	9	Homo sapiens	P15309 (AlphaFold model)
TCR156 alpha chain S32M extracellular domains	D	protein	255	Homo sapiens
TCR156 beta chain extracellular domains	E	protein	307	Homo sapiens

Sequence of entity 1 (A), FASTA

>9NMX_1 HLA class I histocompatibility antigen, A alpha chain (chains A)
MGSHSMRYFFTSVSRPGRGEPRFIAVGYVDDTQFVRFDSDAASQRMEPRAPWIEQEGPEY
WDGETRKVKAHSQTHRVDLGTLRGYYNQSEAGSHTVQRMYGCDVGSDWRFLRGYHQYAYD
GKDYIALKEDLRSWTAADMAAQTTKHKWEAAHVAEQLRAYLEGTCVEWLRRYLENGKETL
QRTDAPKTHMTHHAVSDHEATLRCWALSFYPAEITLTWQRDGEDQTQDTELVETRPAGDG
TFQKWAAVVVPSGQEQRYTCHVQHEGLPKPLTLRWEPSS

Sequence of entity 2 (B), FASTA

>9NMX_2 Beta-2-microglobulin (chains B)
MIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKD
WSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM

Sequence of entity 3 (C), FASTA

>9NMX_3 Prostatic acid phosphatase (chains C)
TLMSAMTNL

Sequence of entity 4 (D), FASTA

>9NMX_4 TCR156 alpha chain S32M extracellular domains (chains D)
QQKEVEQNSGPLSVPEGAIASLNCTYSDRGSQMFFWYRQYSGKSPELIMFIYSNGDKEDG
RFTAQLNKASQYVSLLIRDSQPSDSATYLCAVNNARLMFGDGTQLVVKPNIQNPDPAVYQ
LRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKCVLDMRSMDFKSNSAVAWSNKSDF
ACANAFNNSIIPEDTFFPSPESSSRGGLEVLFQGPEFGGSTTAPSAQLKKKLQALKKKNA
QLKWKLQALKKKLAQ

Sequence of entity 5 (E), FASTA

>9NMX_5 TCR156 beta chain extracellular domains (chains E)
GVTQTPKHLITATGQRVTLRCSPRSGDLSVYWYQQSLDQGLQFLIQYYNGEERAKGNILE
RFSAQQFPDLHSELNLSSLELGDSALYFCASSVAGSPEAFFGQGTRLTVVEDLKNVFPPE
VAVFEPSEAEISHTQKATLVCLATGFYPDHVELSWWVNGKEVHSGVCTDPQPLKEQPALN
DSRYALSSRLRVSATFWQNPRNHFRCQVQFYGLSENDEWTQDRAKPVTQIVSAEAWGRAD
SRGGLEVLFQGPEFGGSTTAPSAQLEKELQALEKENAQLEWELQALEKELAQGLNDIFEA
QKIEWHE

Ligands and cofactors

ID	Name	Formula	Copies
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	C8 H15 N O6	3
MLI	Malonate ion	C3 H2 O4	2

Water and common crystallization additives (NA, GOL) are not listed.

Primary citation

Overcoming T cell tolerance to tumor self-antigens through catch-bond engineering. Chen, X., Mao, Z., Kolawole, E.M. et al. Science (2026) 391:eadx3162-eadx3162. DOI 10.1126/science.adx3162 · PubMed

Other PDB entries of the same protein (UniProt A5I8L1 (AlphaFold model), which also has an AlphaFold model), best resolution first:

9SKO 1.49 Å, Crystal structure of HLA-A0201 in complex with peptide LLWNGPMAVS
9SL0 1.6 Å, Crystal structure of HLA-A0201 in complex with peptide LLWNGPMAV
9SKP 1.89 Å, Crystal structure of HLA-A0201 in complex with peptide SLLWNGPMAV
9NMV 1.97 Å, TCR156 S32Halpha bound to HLA A*02:01-PAP
9NMY 2.01 Å, TCR156 S32Qalpha bound to HLA A*02:01-PAP
9T2A 2.04 Å, Human Single Domain TCR-like Antibody 6K23 in complex with NY-ESO-1(C165V):HLA-A0201
9NMU 2.1 Å, TCR156 bound to HLA A*02:01-PAP
9NMW 2.11 Å, TCR156 S30Ealpha S32Qalpha bound to HLA A*02:01-PAP
9O5S 2.27 Å, minibinder-antigen complex BXMart1-3-MART1-HLA*A02
9T2B 2.34 Å, Human Single Domain TCR-like Antibody 5F17 in complex with NY-ESO-1(C165V):HLA-A0201
9YTD 2.5 Å, Designed antibody vAB66 targeting PAP-HLA A*02:01
9T2C 2.89 Å, Human Single Domain TCR-like Antibody A10 in complex with NY-ESO-1(C165V):HLA-A0201

Browse structure collections

About this viewer

MolViewer shows 9NMX directly in your browser with nothing to install. Switch between cartoon, ball-and-stick, spacefill and surface views, color by chain, secondary structure or B-factor, measure distances, angles and dihedrals, and share or embed the view.