대식량 이동 억제 인자

Macrophage migration inhibitory factor
MIF
Protein MIF PDB 1ca7.png
사용 가능한 구조물
PDB직교 검색: PDBe RCSB
식별자
별칭MIF, GIF, GLIF, mmacropage 마이그레이션 억제 인자(글리코실레이션-억제 인자), 대식량 마이그레이션 억제 인자
외부 IDOMIM: 153620 MGI: 96982 HomoloGene: 55655 GeneCard: MIF
EC 번호5.3.3.12
직교체
인간마우스
엔트레스
앙상블
유니프로트
RefSeq(mRNA)

NM_002415

NM_010798

RefSeq(단백질)

NP_002406
NP_002406.1

NP_034928

위치(UCSC)Cr 22: 23.89 – 23.9MbChr 10: 75.7 – 75.7Mb
PubMed 검색[3][4]
위키다타
인간 보기/편집마우스 보기/편집
대식량 마이그레이션 억제 인자(MIF)
식별자
기호MIF
PfamPF01187
인터프로IPR001398
프로사이트PDOC00892
SCOP21mif / SCOPe / SUPFAM

대식세포이동억제인자(MIF), L-도파크롬 이소머라아제 또는 페닐피루베이트 tautomerase라고도 알려진 대식세포이동억제인자(MIF)는 인간에서 MIF 유전자에 의해 인코딩되는 단백질이다.[5][6]MIF는 선천적 면역의 중요한 조절기다.[7]MIF 단백질 슈퍼 패밀리는 기능적으로 관련된 성질을 가진 두 번째 멤버인 D-도파크롬 tautomerase(D-DT)도 포함한다.[8]CD74는 MIF의 표면 수용체다.[9]

박테리아 항원백혈구를 자극하여 MIF를 혈류로 방출한다.[10]순환 MIF는 다른 면역세포의 CD74와 결합하여 급성 면역반응을 일으킨다.따라서 MIF는 염증성 사이토카인으로 분류된다.게다가 글루코코르티코이드들은 또한 백혈구를 자극하여 MIF를 방출하고 따라서 MIF는 부분적으로 글루코코르티코이드들이 면역체계에 미치는 억제 효과를 상쇄시킨다.마지막으로 외상전방 뇌하수체를 활성화하여 MIF를 방출한다.[11]

구조

대식세포 이동 억제 인자는 동일한 세 개의 하위 유니트로 구성된 트리머로 조립된다.각각의 모노머에는 2개의 대타렐 알파 나선과 4개의 줄무늬 베타 시트가 들어 있다.모노머는 중심 채널을 3배 회전 대칭으로 둘러싸고 있다.[12][13]

부상에 대한 대응

사이토카인은 상처 치유와 조직 회복을 촉진하는 데 중요한 역할을 한다.세포 부상은 MIF 방출로 이어 CD74와 상호작용한다. MIF-CD74 신호는 부상 중 숙주를 보호하는 생존 및 증식 경로를 활성화한다.[14]

효소 활성

MIF에는 촉매 활성의 두 가지 모티브가 포함되어 있다.첫 번째는 N-terminus에 위치한 27개의 아미노산 모티브로 2-카르복시-2,3-디하이드록신돌-5,6-퀴논(도파크롬)을 5,6-디하이드록신돌-2-카르복시산(DHICA)으로 변환하는 촉매제 역할을 할 수 있는 페닐피루브레이트 토토머레이즈.[15][16]MIF는 또한 이황화 환원제로 기능하는 것으로 보이는 잔류물 57과 60 사이의 Cys-Ala-Leu-Cys 촉매 부지를 포함한다.[17]

함수

이 유전자는 세포 매개 면역, 면역억제, 염증 등과 관련된 림프구를 암호화한다.[18][19][20]MIF는 글루코르티코이드의 항염증 효과 억제를 통해 호스트 방어에서 대식세포 기능을 규제하는 역할을 한다.[20][21][22]이 림포킨과 JAB1 단백질은 말초 혈장막 근처의 세포솔에서 복합체를 형성하며, 이것은 통합 신호 경로의 역할을 나타낼 수 있다.[23]

작용기전

MIF는 CD74에 바인딩되어 [24]인산염CD44의 모집을 유도하여 비수용체 타이로신 키나제를 활성화하여 궁극적으로 세포외 신호 조절 키나제 인산염으로 이어진다.[25]ERK 외에도 CD74 자극은 PI3K-Akt, NF-164B, AMP-활성 단백질 키나아제(AMPK) 경로와 같은 다른 신호 경로를 활성화한다.[26]

상호작용

대식세포 마이그레이션 억제 요인은 다음과 상호작용하는 것으로 보고되었다.

임상적 유의성

MIF는 패혈증, 류마티스 관절염, 암의 잠재적인 약물 목표물이다.[40][41]

기생충 생산 MIF 호몰로고

면역 회피, 침입, 병태생성에서의 기생충 생산 MIF 사이토카인

복수의 원생동물 기생충은 인간 MIF와 유사한 염증 기능을 가진 동질성 MIF를 생성하며, 이들의 병원성, 침입, 면역 회피에 역할을 한다.[42][43]한 임상 전 연구는 기생충 MIF를 차단하는 것이 심각한 원생동물 감염에서 결과를 향상시킨다는 것을 보여주었다.[44]보고된 MIF 호몰로지를 가진 원생대의 예:

참조

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