Gene organization of the quail major histocompatibility complex ( MhcCoja ) class I gene region

1999 ◽  
Vol 49 (5) ◽  
pp. 384-394 ◽  
Author(s):  
Takashi Shiina ◽  
Chiori Shimizu ◽  
Akira Oka ◽  
Yoshika Teraoka ◽  
Tadashi Imanishi ◽  
...  
Keyword(s):  
Major Histocompatibility Complex ◽  
Gene Organization ◽  
Class I ◽  
Gene Region ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
I Gene

Evolutionary Relationships of Major Histocompatibility Complex Class I Genes in Simian Primates

Genetics ◽  
2004 ◽  
Vol 166 (4) ◽  
pp. 1897-1907
Author(s):  
Hiromi Sawai ◽  
Yoshi Kawamoto ◽  
Naoyuki Takahata ◽  
Yoko Satta
Keyword(s):  
Major Histocompatibility Complex ◽  
Distinct Group ◽  
Gene Organization ◽  
Class I ◽  
Phylogenetic Position ◽  
Specific Gene ◽  
New World Monkeys ◽  
Major Histocompatibility ◽  
Nucleotide Substitutions ◽  
Histocompatibility Complex

Abstract New World monkeys (NWMs) occupy a critical phylogenetic position in elucidating the evolutionary process of major histocompatibility complex (MHC) class I genes in primates. From three subfamilies of Aotinae, Cebinae, and Atelinae, the 5′-flanking regions of 18 class I genes are obtained and phylogenetically examined in terms of Alu/LINE insertion elements as well as the nucleotide substitutions. Two pairs of genes from Aotinae and Atelinae are clearly orthologous to human leukocyte antigen (HLA) -E and -F genes. Of the remaining 14 genes, 8 belong to the distinct group B, together with HLA-B and -C, to the exclusion of all other HLA class I genes. These NWM genes are classified into four groups, designated as NWM-B1, -B2, -B3, and -B4. Of these, NWM-B2 is orthologous to HLA-B/C. Also, orthologous relationships of NWM-B1, -B2, and -B3 exist among different families of Cebidae and Atelidae, which is in sharp contrast to the genus-specific gene organization within the subfamily Callitrichinae. The other six genes belong to the distinct group G. However, a clade of these NWM genes is almost equally related to HLA-A, -J, -G, and -K, and there is no evidence for their orthologous relationships to HLA-G. It is argued that class I genes in simian primates duplicated extensively in their common ancestral lineage and that subsequent evolution in descendant species has been facilitated mainly by independent loss of genes.

Functional expression of a heterologous major histocompatibility complex class I gene in transgenic mice

1987 ◽  
Vol 7 (11) ◽  
pp. 4003-4009
Author(s):  
C Bieberich ◽  
T Yoshioka ◽  
K Tanaka ◽  
G Jay ◽  
G Scangos
Keyword(s):  
Major Histocompatibility Complex ◽  
Transgenic Mice ◽  
Major Histocompatibility Complex Class ◽  
Inbred Mice ◽  
Class I ◽  
Dependent Manner ◽  
Complex Class ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
I Gene

The regulated expression of major histocompatibility complex class I antigens is essential for assuring proper cellular immune responses. To study H-2 class I gene regulation, we have transferred a foreign class I gene to inbred mice and have previously shown that the heterologous class I gene was expressed in a tissue-dependent manner. In this report, we demonstrate that these mice expressed the transgenic class I molecule on the cell surface without any alteration in the level of endogenous H-2 class I antigens. Skin grafts from transgenic mice were rapidly rejected by mice of the background strain, indicating that the transgenic antigen was expressed in an immunologically functional form. As with endogenous H-2 class I genes, the class I transgene was inducible by interferon treatment and suppressible by human adenovirus 12 transformation. Linkage analysis indicated that the transgene was not closely linked to endogenous class I loci, suggesting that trans-regulation of class I genes can occur for class I genes located outside the major histocompatibility complex.

scholarly journals A transcription factor interacting with the class I gene enhancer is inactive in tumorigenic cell lines which suppress major histocompatibility complex class I genes.

1990 ◽  
Vol 10 (8) ◽  
pp. 4100-4109 ◽  
Author(s):  
U Henseling ◽  
W Schmidt ◽  
H R Schöler ◽  
P Gruss ◽  
A K Hatzopoulos
Keyword(s):  
Transcription Factor ◽  
Major Histocompatibility Complex ◽  
Major Histocompatibility Complex Class ◽  
Cell Lines ◽  
Class I ◽  
Complex Class ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
Mouse Tissues ◽  
I Gene

AKR leukemias display different amounts of major histocompatibility complex class I antigens on the cell surface. The absence of H-2Kk molecules correlates with the ability of these cell lines to form tumors in vivo as well as to escape lysis by cytotoxic T lymphocytes in vitro. In this report it is shown that the 5' regulatory area of the H-2Kk gene failed to activate transcription in H-2Kk-negative cells. Examination of the proteins interacting with the H-2Kk enhancer in expressing and nonexpressing cells revealed clear differences. In particular, the level of a nuclear protein interacting at position -166 was greatly reduced in the negative cell lines. A transcription factor, known as H2TF1 or KBF1, has been shown previously to interact with this binding site and to be essential for the expression of certain class I genes as well as the expression of beta 2-microglobulin. These results demonstrate that the molecular mechanism of class I gene suppression in malignant tumor cells is at the level of transcription and is most probably modulated by H2TF1/KBFI. In addition, it is shown that the same transcription factor is only present in mouse tissues expressing class I antigens.

scholarly journals Functional expression of a heterologous major histocompatibility complex class I gene in transgenic mice.

1987 ◽  
Vol 7 (11) ◽  
pp. 4003-4009 ◽  
Author(s):  
C Bieberich ◽  
T Yoshioka ◽  
K Tanaka ◽  
G Jay ◽  
G Scangos
Keyword(s):  
Major Histocompatibility Complex ◽  
Transgenic Mice ◽  
Major Histocompatibility Complex Class ◽  
Inbred Mice ◽  
Class I ◽  
Dependent Manner ◽  
Complex Class ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
I Gene

The regulated expression of major histocompatibility complex class I antigens is essential for assuring proper cellular immune responses. To study H-2 class I gene regulation, we have transferred a foreign class I gene to inbred mice and have previously shown that the heterologous class I gene was expressed in a tissue-dependent manner. In this report, we demonstrate that these mice expressed the transgenic class I molecule on the cell surface without any alteration in the level of endogenous H-2 class I antigens. Skin grafts from transgenic mice were rapidly rejected by mice of the background strain, indicating that the transgenic antigen was expressed in an immunologically functional form. As with endogenous H-2 class I genes, the class I transgene was inducible by interferon treatment and suppressible by human adenovirus 12 transformation. Linkage analysis indicated that the transgene was not closely linked to endogenous class I loci, suggesting that trans-regulation of class I genes can occur for class I genes located outside the major histocompatibility complex.

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