Kedu ihe kpatara mkpuchi HDX-MS ji dị mkpa na nyocha TCR-Peptide-HLA

Kedu map mkpuchi HDX-MS na-akọ n'ezie

N'ime ala-elu HDX-MS workflow, A na-agbari protein ma ọ bụ ihe mgbagwoju anya - nke na-abụkarị site na pepsin na-enweghị ike imegharị ya - na peptides na-esi na ya pụta na-ekewa site na chromatography mmiri mmiri wee chọpụta site na uka spectrometry.. Onye ọ bụla peptide proteolytic na-ebu uru deuterium-uptake n'oge akara akara ọ bụla. Nchịkọta peptides ndị a achọpụtara n'ofe usoro a na-akpọ maapụ mkpuchi (mgbe ụfọdụ, maapụ peptide).

Map mkpuchi ahụ zara ajụjụ abụọ pụtara ìhè. Mbụ, Kedu mpaghara nke usoro a na-enyocha n'ezie? Nke abụọ, ole ndakọtara, peptides nwere obi ike na-akwado akụkụ ọ bụla? Dị ka a chịkọtara na ihe ndabere nke HDX-MS, Mpaghara ndị ọtụtụ peptides na-ekpuchi ekpuchi na-amịpụta nke siri ike, ọgụgụ agụpụtara nke ọma, ebe ogologo ma ọ bụ na-ekpuchighị ekpuchi adịghị enye ozi gbasara mgbanwe.

Peptide Synthesis Nke Ụzọ okike HDX-MS nduzi na-enye ọtụtụ ndụmọdụ na-emeso mkpuchi dịka ọkpụkpụ azụ nke siri ike: kọọ akụkọ ahụ, na-enye atụmatụ nnabata kwa-peptide na ndahie ọkọlọtọ ha, ma mee nyocha nke ịdị mma (gel denaturing, oke emebibeghị, na, ebe ọ dị mkpa, oke-wepu ma ọ bụ nwa amaala MS) tupu labeling amalite. Mpaghara protein dị jụụ dị mfe ichefu mgbe ị na-akọwa maapụ dị iche, mana maapụ mkpuchi na-amanye ha nleba anya.

Kedu ka Maapụ mkpuchi si amụba ihe nhazi yana mmechi

Ike ntụgharị nke HDX-MS na ọmụmụ TCR-peptide-HLA bụ na ọ na-atụgharị ndepụta mgbanwe ngbanwe ka ọ bụrụ maapụ njikọ nwere uru bara uru - ma ọ bụrụhaala na mkpuchi ahụ na-akwado nhazi mpaghara.. Enweghị ike ịgụ mpaghara ekpuchighị ekpuchi dị ka "anaghị agbanwe agbanwe"; ọ bụ nnọọ amaghị. Maapụ mkpuchi na-eme ka oke ndị ahụ pụta ìhè ka onye nyocha ghara ịkọwapụta enweghị mgbaama dị ka enweghị mgbanwe nhazi..

Peptides sịntetik src = "https://molchanges.com/wp-content/uploads/2026/09/pub_20260904_102802_361_a6c5a1d6f08a493c9f4d3cc4fc9a3767.png">

Dịkwa mkpa, map mkpuchi na-enyere aka ikewapụ nchebe interface ozugbo si indirect, allosteric mgbanwe. HDX-MS na-akọ ike, ozi ọkwa peptide kama nkọwa nke atọm. Mgbe akụkụ nke echedoro n'elu nguzobe dị mgbagwoju anya na-agbanye ọtụtụ peptides n'elu, nkwubi okwu na ọ na-anọdụ na interface njikọ bụ nnọọ ihe nchebe. Mgbe nchedo pụtara na mpaghara dị anya na elu kọntaktị a na-atụ anya ya, Mkpuchi mkpuchi na-eme ka onye nyocha na-arụrịta ụka maka ezigbo nzaghachi ngbanwe ogologo ogologo kama ịbụ ihe nlere anya dị obere..

Ọdịiche a dị mkpa n'ime usoro ihe ọmụmụ ihe niile. Mpaghara nke na-egbochi njikọ nke onye mmekọ nwere ike igosipụta ezigbo mgbanwe mgbanwe, ebe mpaghara anaghị ekpuchi ma ọlị ga-apụta jụụ na maapụ dị iche ma nwee ike jiri nwayọ duhie nkọwa nke ụdị ụgbọ mmiri..

Kedu ihe mkpuchi mkpuchi na-ekpughe gbasara ntinye aka TCR na ọnọdụ njide

Ndị TCR na-amata peptides dị mkpụmkpụ nke HLA gosipụtara, na geometry nke njikọ aka ahụ bụ ajụjụ dị mkpa na ọgwụ mgbochi ọrịa. Ndochi ụgbọ mmiri na-edobe TCR diagonally n'ofe peptide-njide groove: loops CDR1 na CDR2 na-akpọtụrụ elu nke MHC α-helices, ebe loops CDR3 na-agbanwe agbanwe na-etinye aka na peptide a gosipụtara n'onwe ya. A 2024 Frontiers na-amụ ọnụọgụgụ TCR:pMHC-M mgbanwe mgbanwe na-emesi foto a ike: CDR3a na-achịkwa kọntaktị na ọkara N-terminal nke peptides na-abụghị aha yana CDR3β ọkara C-terminal., na peptides bụ otu n'ime ihe ndị kasị conformationally mobile akụrụngwa nke mgbagwoju.

Ọkwa peptide nke HDX-MS nwere ike ịga n'ihu wee mata ọdịiche nke TCRs na-etinye pHLA cognate ha na-arụpụta nke ọma na ndị na-adịghị - na ọbụna na-ekewapụta akara ukwu., gụnyere canonical megide ọdụ ụgbọ mmiri na-abụghị nke canonical yana lekwasịrị anya etiti na kọntaktị TCR kwụsịrị. Na omume, deuterium dị iche iche n'ofe mpaghara CDR na α-helix kpuchiri nke ọma na-ekpughe ebe nchekwa na-elekwasị anya mgbe TCR nyere., ikwe ka ndị na-eme nchọpụta tụnyere otú TCRs ma ọ bụ variants dị iche iche si anabata otu ebumnuche pHLA.

A Ọmụmụ HDX-MS nke ụdị TCR emelitere mmekọrịta (Ezubere SONG-A*0201 na-egosi NY-ESO-1) na-egosi omimi dị: Njikọ pMHC bụ isi gbanwere nchedo TCR CDR, na otu mutant β-CDR3 mepụtara mbinye aka bimodal EX1 kwekọrọ na ụdị njide na-adaba ngwa ngwa kama inwe mmekọrịta mkpọchi na igodo siri ike.. Nkwubi okwu ndị a na-ebu ibu naanị mgbe CDR loops, peptide, na MHC α-helices na-anọdụ ala n'ime obi ike kpuchie, akụkụ peptide na-ekpuchi elu.

Ihe kpatara Peptide Reagent ji bụrụ akụkụ nke ajụjụ nhazi ahụ

Ibu peptide anaghị abanye n'ime oghere ahụ; na-emezi usoro ahụ. Nrụpụta-arụ ọrụ ike na-egosi ntinye peptide na-akpụzi omume conformational nke HLA, na peptide mkpanaka n'onwe ya ka a na-akpọtụrụ ya ozugbo site na loops TCR CDR3. Nke ahụ pụtara na kpọmkwem chemical ụlọ ọrụ kwajuru n'ime HLA bụ ihe HDX-MS na-ajụ ajụjụ - yana usoro ya na ịdịmma ya na-ekpebi ozugbo ịgụpụta ya..

Nke a bụ ebe imepụta peptide na ihe ndị dị ndụ gbara ya gburugburu na-agbakọta. Ma usoro ọ na-ejikọta HLA allele nyere dabere na ihe fọdụrụ arịlịka na ihe ejigide. Otu peptide nke na-adịghị abanye n'ime oghere ahụ enweghị ike ịmepụta mgbagwoju anya nke ternary nke ọmụmụ na-ezube ịtụ.. Ya mere imewe na-ekpebi nke mgbagwoju anya dị na nnwale nlebanyere.

Njikwa mgbanwe bụkwa enweghị ikewa. Nyocha na peptides sịntetik nwere mgbanwe kemịkalụ amaghị ama na-egosi na mgbanwe ndị a na-atụghị anya ya nwere ike ime site na nmimi molekụla, na-eme ka clones T-cell rụọ ọrụ na-atụghị anya ya, nkọwapụta nke nwere ike ime ihe. Ọbụna obere mgbanwe a na-atụghị anya ya nwere ike ịmepụta epitope ọhụrụ ma ọ bụ ngbanwe TCR - nke pụtara na akara ukwu a tụrụ atụ nwere ike ịbụ nke ụdị ndị ọzọ na-abụghị nke emebere..

Ihe anọ jikọrọ ọnụ iji tụlee ọnụ na Immunology Workflows

Na nyocha nke peptide na HLA, Ọ dịghị otu QC paramita guzo naanị ya. A ghaghị ịgwọ ihe anọ dị ka usoro ejikọtara, n'ihi na adịghị ike n'ime onye ọ bụla nwere ike imebi nnwale nke ọma.

Nhazi Peptide na-esetịpụ antigen a chọrọ: ihe motif, ọnọdụ arịlịka, na ogologo nke na-ekpebi njikọ HLA na ngosi. Usoro dabara nke ọma mana usoro ndu na-ezighi ezi na-emebi nnwale ahụ.

Njikwa mgbanwe verifies na peptide na-ebu kpọmkwem mgbanwe e bu n'obi - na ọ dịghị onye na-atụghị anya ya. N'ihi na trace gbanwetụrụ ụdị nwere ike dị ike, Chemistry mgbanwe a na-achịkwaghị achịkwa bụ isi mmalite nke arịa dị n'ime ma cellular na HDX-MS readouts..

Ịdị ọcha na-akọwa akụkụ dị nta nke ihe nlele ahụ bụ usoro ebumnuche ziri ezi. sịntetik peptides na-akwakọba mkpọmkpọ ebe, usoro nhichapụ, na ngwaahịa akụkụ, na nyocha adịghị ọcha peptide na nnwale ọgwụ mgbochi egosila na usoro QC na-aga n'ihu nwere ike tufuo peptides na-emerụ emerụ n'ụzọ ndụ. Mgbe mkpụrụ ndụ T na-azaghachi na mkpokọta ọnụọgụ, ma ọ bụ mgbe nnukwu spectrometer na-ekiri maapụ peptide, adịghị ọcha nwere ike megharịa dị ka mgbaàmà ma ọ bụ kwụsị ya.

Nkọwapụta nyocha na-emechi loop. Dị ka teknụzụ nduzi na ịmata ọdịiche dị ọcha peptide na ọdịnaya nrụgide, Ntụgharị-na-adọ HPLC ịdị ọcha na-akọ na mpaghara isi-ọnụ kacha elu mana anaghị agụta mmiri, nnu, ma ọ bụ counterions nọ ọdụ na vial. Mass spectrometry na-akwado njirimara mana ọ nwere ike na-atụfu ihe na-emetọ obe. Ọdịnaya peptide site na nyocha amino acid na-enye ezi ego enwere ike iji ya, na njikwa mgbochi (dịka ọmụmaatụ ịtụgharị trifluoroacetate ka ọ bụrụ acetate) okwu ebe ọ bụla ụdị ionic nwere ike igbochi ihe ọgụgụ MS.

Nke ọ bụla n'ime ihe anọ ndị a na-aza otu n'ime ajụjụ atọ jikọtara ọnụ: Ọ bụ peptide ziri ezi? Ọ bụ kemịkalụ na-agbanwe agbanwe? Ọ dị ọcha nke ọma na agụpụtara na-egosipụta antigen e bu n'obi kama ịbụ ihe arịa? Ọ dịghị nke bụ nhọrọ, na ọnụ ha na-ekpebi ma HDX-MS mkpuchi maapụ na-akọwa ihe mgbagwoju anya emebere ma ọ bụ nke a na-atụghị anya ya.

Ndepụta nyocha QC bara uru maka HDX-MS na HLA-Binding Work

Maka peptide ezubere iburu n'ime usoro HDX-MS ma ọ bụ TCR-peptide-HLA, choo ngwugwu nyocha nke dabara na uche nke nyocha nke ala karia asambodo jeneriki.

• Kwado usoro a na-atụ anya site na oke na-emebibeghị, ebe achọrọ njiri mara usoro-larịị, site na MS/MS peptide mapping.

• Mepụta ịdị ọcha HPLC na ≥95%, ma na-ahọrọ ≥98% maka arụrụ arụ na arụrụ arụ na-enwe mmetụta nke ọnụọgụ ma ọ bụ adịghị ọcha..

• Rịọ maka ọdịnaya peptide site na nyocha amino acid ka ejiri mara ọnụọgụ peptide ziri ezi enwere ike iji, ọ bụghị naanị obere akụkụ chromatographic. Mmepụta Peptide

• Ezipụta ma chọpụta ụdị mgbagha, ọkachasị mgbe trifluoroacetate nwere ike igbochi ionization ma ọ bụ ịgụpụta ion.

• Nyochaa mgbanwe ndị e bu n'obi wee lelee ndị na-achọghị, karịsịa na residues reactive ma ọ bụ mgbe peptide na-ebu saịtị abụọ ma ọ bụ karịa mgbanwe.

• Rịọ data nyocha akọwapụtara nza ma tulee ịdị ọcha, ọdịnaya, na profaịlụ adịghị ọcha n'ofe ogbe tupu ị nye iwu maka ogologo ọmụmụ ihe.

Ndị ọkachamara na-ebubata ihe na-emepụta ihe ndị a na usoro ọrụ. A omenala peptide njikọ ikpo okwu nke na-enye ọkwa dị ọcha akọwapụtara ruo 99%, peptides nke a na-akpọ isotope maka ụkpụrụ ime na nhazi-mmekọrịta MS, na akwụkwọ ule peptide na njirimara nyocha - atụgharị-na-adọ HPLC, uka spectrometry, amino acid analysis, mgbanwe counterion, na njikwa ịmụ nwa - na-enye ọrụ nhazi usoro ihe ọ chọrọ n'elu ngwa HDX-MS..

Maka ndụmọdụ: Mgbe ị nyere iwu ọtụtụ peptide analogs maka panel TCR-peptide-HLA, tụnyere ọ bụghị naanị pasentị ịdị ọcha ha na-ekwu mana profaịlụ adịghị ọcha ha na ọdịnaya peptide n'akụkụ n'akụkụ. Abụọ peptides nwere otu ịdị ọcha aha nwere ike ịnapụta ụdị ihe eji arụ ọrụ dị iche iche - yana omume njide dị iche iche..

Mkpuchi na njikwa bụ akụkụ abụọ nke HDX-MS a pụrụ ịdabere na ya

Ọmụmụ HDX-MS nke mgbagwoju TCR-peptide-HLA bụ naanị ntụkwasị obi dịka maapụ mkpuchi ya na reagent ya.. Ihe mkpuchi na-ekpebi ebe usoro nwere ike iji obi ike kwuo okwu; imewe peptide, njikwa mgbanwe, ịdị ọcha, na njirimara nyocha na-achọpụta na mgbagwoju anya a na-enyocha bụ nke onye nyocha ahụ zubere. Na-emeso ha dị ka otu usoro kama ịpụ iche iche, na nkọwa nhazi ahụ na-enweta ike nke ubi ahụ na-atụ anya ya.

Ọ bụrụ na ndị otu gị na-emepụta peptides ma ọ bụ HLA ligands maka nhazi na ọmụmụ ihe na-ejikọta ma chọọ ikwurịta ọkwa ịdị ọcha., mgbanwe chemistry, ma ọ bụ data nyocha n'azụ ogbe, Ndị ọkachamara peptide MOL nwere ike nyochaa ya akwụkwọ mma na QC chọrọ maka usoro ọrụ gị akọwapụtara.