Question: Which are the genes responsible for Dyskeratosis Congenita?

Context:
Studies over the last 15 years have led to significant advances, with 8 DC genes (DKC1, TERC, TERT, NOP10, NHP2, TIN2, C16orf57, and TCAB1) having been characterized
Seven of these are important in telomere maintenance either because they encode components of the telomerase enzyme complex (DKC1, TERC, TERT, NOP10, NHP2, and TCAB1) or the shelterin complex (TINF2)
Dyskeratosis congenita (DC) is a heterogeneous bone marrow failure syndrome with seven disease-causing genes identified to date, six of which are linked to telomere maintenance. Mutations in one of these genes (TINF2), which encodes a component of the shelterin complex, are associated with particularly short telomeres
Dyskeratosis congenita (DC) is an inheritable bone marrow failure syndrome characterized by reticulated hyperpigmentation, dystrophic nails and oral leukoplakia
Four genes, namely DKC1 (codes for dyskerin), TERC and TERT (code for telomerase) and NOP10, have been implicated in the pathogenesis
To date, CTC1, DKC1, TERC, TERT, TINF2, NHP2, NOP10, and WRAP53 are the genes in which mutations are known to cause DC and result in very short telomeres
The mode of inheritance of DC varies by gene: DKC1 (X-linked), TERC and TINF2 (autosomal dominant), TERT (autosomal dominant or autosomal recessive), CTC1, WRAP53, NHP2, and NOP10 (autosomal recessive)
Six genes have been identified, defects in which cause different genetic subtypes (X-linked recessive, autosomal dominant, autosomal recessive) of DC. The products of these genes encode components that are critical for telomere maintenance; either because they are core constituents of telomerase (dyskerin, TERC, TERT, NOP10 and NHP2) or are part of the shelterin complex that protects the telomeric end (TIN2)
BACKGROUND: Telomerase complex genes mutations (DKC1, TERC, TERT, and NOP10) lead to premature telomere shortening and are responsible for different forms of dyskeratosis congenita.
Mutations in DKC1 gene encoding dyskerin are responsible for the X-linked dyskeratosis congenita.
The DC1 gene responsible for the X linked form (MIM 305000) of dyskeratosis congenita has been mapped to Xq28.
The DC1 gene responsible for the X linked form (MIM 305000) of dyskeratosis congenita has been mapped to Xq28
Mutations in DKC1 gene encoding dyskerin are responsible for the X-linked dyskeratosis congenita
Mutations in the DKC1 gene are responsible for causing X-linked recessive dyskeratosis congenita (DKC) and a more severe allelic variant of the disease, Hoyeraal-Hreidarsson syndrome
Telomerase complex genes mutations (DKC1, TERC, TERT, and NOP10) lead to premature telomere shortening and are responsible for different forms of dyskeratosis congenita
Linkage analysis in multiplex families confirmed that the DKC1 gene, responsible for the X-linked form of DC, is located within Xq28 and facilitated its positional cloning
DKC1 has been identified as the gene responsible for X-linked DC, and genetic analyses have been performed in a worldwide study

Answer: To date, 8 genes have been associated with Dyskeratosis Congenita development. These are DKC1, TERC, TERT, NOP10, NHP2, TIN2, C16orf57, and TCAB1. Seven of these are important in telomere maintenance, because either they encode components of the telomerase enzyme complex (DKC1, TERC, TERT, NOP10, NHP2, and TCAB1) or the shelterin complex (TINF2).
To date, CTC1, DKC1, TERC, TERT, TINF2, NHP2, NOP10, and WRAP53 are the genes in which mutations are known to cause DC and result in very short telomeres  Seven of these are important in telomere maintenance either because they encode components of the telomerase enzyme complex (DKC1, TERC, TERT, NOP10, NHP2, and TCAB1) or the shelterin complex (TINF2)  
Exact answer: DKC1, TERC, TERT, NOP10, NHP2, TIN2, C16orf57, TCAB1