Extract particular lines from a file

Hi all,

I have a file with many records with information as given below

ID   A16L2_HUMAN             Reviewed;         619 AA.
AC   Q8NAA4; A5PL30; B2RPK5; Q658V4; Q6PID3; Q8NBG0;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   20-MAY-2008, sequence version 2.
DT   05-SEP-2012, entry version 77.
DE   RecName: Full=Autophagy-related protein 16-2;
DE   AltName: Full=APG16-like 2;
DE   AltName: Full=WD repeat-containing protein 80;
GN   Name=ATG16L2; Synonyms=WDR80;
OS   Homo sapiens (Human).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini;
OC   Catarrhini; Hominidae; Homo.
OX   NCBI_TaxID=9606;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 2).
RC   TISSUE=Astrocyte, and Spleen;
RX   PubMed=14702039; DOI=10.1038/ng1285;
RA   Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R.,
RA   Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H.,
RA   Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S.,
RA   Yamamoto J., Saito K., Kawai Y., Isono Y., Nakamura Y., Nagahari K.,
RA   Murakami K., Yasuda T., Iwayanagi T., Wagatsuma M., Shiratori A.,
RA   Sudo H., Hosoiri T., Kaku Y., Kodaira H., Kondo H., Sugawara M.,
RA   Takahashi M., Kanda K., Yokoi T., Furuya T., Kikkawa E., Omura Y.,
RA   Abe K., Kamihara K., Katsuta N., Sato K., Tanikawa M., Yamazaki M.,
RA   Ninomiya K., Ishibashi T., Yamashita H., Murakawa K., Fujimori K.,
RA   Tanai H., Kimata M., Watanabe M., Hiraoka S., Chiba Y., Ishida S.,
RA   Ono Y., Takiguchi S., Watanabe S., Yosida M., Hotuta T., Kusano J.,
RA   Kanehori K., Takahashi-Fujii A., Hara H., Tanase T.-O., Nomura Y.,
RA   Togiya S., Komai F., Hara R., Takeuchi K., Arita M., Imose N.,
RA   Musashino K., Yuuki H., Oshima A., Sasaki N., Aotsuka S.,
RA   Yoshikawa Y., Matsunawa H., Ichihara T., Shiohata N., Sano S.,
RA   Moriya S., Momiyama H., Satoh N., Takami S., Terashima Y., Suzuki O.,
RA   Nakagawa S., Senoh A., Mizoguchi H., Goto Y., Shimizu F., Wakebe H.,
RA   Hishigaki H., Watanabe T., Sugiyama A., Takemoto M., Kawakami B.,
RA   Yamazaki M., Watanabe K., Kumagai A., Itakura S., Fukuzumi Y.,
RA   Fujimori Y., Komiyama M., Tashiro H., Tanigami A., Fujiwara T.,
RA   Ono T., Yamada K., Fujii Y., Ozaki K., Hirao M., Ohmori Y.,
RA   Kawabata A., Hikiji T., Kobatake N., Inagaki H., Ikema Y., Okamoto S.,
RA   Okitani R., Kawakami T., Noguchi S., Itoh T., Shigeta K., Senba T.,
RA   Matsumura K., Nakajima Y., Mizuno T., Morinaga M., Sasaki M.,
RA   Togashi T., Oyama M., Hata H., Watanabe M., Komatsu T.,
RA   Mizushima-Sugano J., Satoh T., Shirai Y., Takahashi Y., Nakagawa K.,
RA   Okumura K., Nagase T., Nomura N., Kikuchi H., Masuho Y., Yamashita R.,
RA   Nakai K., Yada T., Nakamura Y., Ohara O., Isogai T., Sugano S.;
RT   "Complete sequencing and characterization of 21,243 full-length human
RT   cDNAs.";
RL   Nat. Genet. 36:40-45(2004).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RA   Mural R.J., Istrail S., Sutton G.G., Florea L., Halpern A.L.,
RA   Mobarry C.M., Lippert R., Walenz B., Shatkay H., Dew I., Miller J.R.,
RA   Flanigan M.J., Edwards N.J., Bolanos R., Fasulo D., Halldorsson B.V.,
RA   Hannenhalli S., Turner R., Yooseph S., Lu F., Nusskern D.R.,
RA   Shue B.C., Zheng X.H., Zhong F., Delcher A.L., Huson D.H.,
RA   Kravitz S.A., Mouchard L., Reinert K., Remington K.A., Clark A.G.,
RA   Waterman M.S., Eichler E.E., Adams M.D., Hunkapiller M.W., Myers E.W.,
RA   Venter J.C.;
RL   Submitted (JUL-2005) to the EMBL/GenBank/DDBJ databases.
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 3).
RC   TISSUE=Eye;
RX   PubMed=15489334; DOI=10.1101/gr.2596504;
RG   The MGC Project Team;
RT   "The status, quality, and expansion of the NIH full-length cDNA
RT   project: the Mammalian Gene Collection (MGC).";
RL   Genome Res. 14:2121-2127(2004).
RN   [4]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 297-619.
RC   TISSUE=Stomach;
RX   PubMed=17974005; DOI=10.1186/1471-2164-8-399;
RA   Bechtel S., Rosenfelder H., Duda A., Schmidt C.P., Ernst U.,
RA   Wellenreuther R., Mehrle A., Schuster C., Bahr A., Bloecker H.,
RA   Heubner D., Hoerlein A., Michel G., Wedler H., Koehrer K.,
RA   Ottenwaelder B., Poustka A., Wiemann S., Schupp I.;
RT   "The full-ORF clone resource of the German cDNA consortium.";
RL   BMC Genomics 8:399-399(2007).
CC   -!- FUNCTION: May play a role in autophagy (By similarity).
CC   -!- SUBCELLULAR LOCATION: Cytoplasm (By similarity).
CC   -!- ALTERNATIVE PRODUCTS:
CC       Event=Alternative splicing; Named isoforms=3;
CC       Name=1;
CC         IsoId=Q8NAA4-1; Sequence=Displayed;
CC       Name=2;
CC         IsoId=Q8NAA4-2; Sequence=VSP_033904;
CC         Note=No experimental confirmation available;
CC       Name=3;
CC         IsoId=Q8NAA4-3; Sequence=VSP_033905;
CC         Note=No experimental confirmation available;
CC   -!- SIMILARITY: Belongs to the WD repeat ATG16 family.
CC   -!- SIMILARITY: Contains 7 WD repeats.
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DR   EMBL; AK093017; BAC04021.1; -; mRNA.
DR   EMBL; AK090597; BAC03485.1; -; mRNA.
DR   EMBL; CH471076; EAW74876.1; -; Genomic_DNA.
DR   EMBL; CH471076; EAW74874.1; -; Genomic_DNA.
DR   EMBL; BC036713; AAH36713.1; -; mRNA.
DR   EMBL; BC137489; AAI37490.1; -; mRNA.
DR   EMBL; BC137490; AAI37491.1; -; mRNA.
DR   EMBL; BC142718; AAI42719.1; -; mRNA.
DR   EMBL; BC146660; AAI46661.1; -; mRNA.
DR   EMBL; AL832974; CAH56355.1; -; mRNA.
DR   IPI; IPI00300536; -.
DR   IPI; IPI00892538; -.
DR   IPI; IPI00892678; -.
DR   RefSeq; NP_203746.1; NM_033388.1.
DR   UniGene; Hs.653186; -.
DR   ProteinModelPortal; Q8NAA4; -.
DR   SMR; Q8NAA4; 327-619.
DR   IntAct; Q8NAA4; 3.
DR   PhosphoSite; Q8NAA4; -.
DR   DMDM; 189027648; -.
DR   PRIDE; Q8NAA4; -.
DR   Ensembl; ENST00000321297; ENSP00000326340; ENSG00000168010.
DR   GeneID; 89849; -.
DR   KEGG; hsa:89849; -.
DR   UCSC; uc001otd.3; human.
DR   CTD; 89849; -.
DR   GeneCards; GC11P072525; -.
DR   H-InvDB; HIX0009913; -.
DR   HGNC; HGNC:25464; ATG16L2.
DR   neXtProt; NX_Q8NAA4; -.
DR   PharmGKB; PA142672575; -.
DR   eggNOG; COG2319; -.
DR   GeneTree; ENSGT00670000097918; -.
DR   HOGENOM; HOG000112569; -.
DR   HOVERGEN; HBG050534; -.
DR   InParanoid; Q8NAA4; -.
DR   OrthoDB; EOG44F68R; -.
DR   PhylomeDB; Q8NAA4; -.
DR   GenomeRNAi; 89849; -.
DR   NextBio; 76342; -.
DR   ArrayExpress; Q8NAA4; -.
DR   Bgee; Q8NAA4; -.
DR   CleanEx; HS_ATG16L2; -.
DR   Genevestigator; Q8NAA4; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0006914; P:autophagy; IEA:UniProtKB-KW.
DR   GO; GO:0015031; P:protein transport; IEA:UniProtKB-KW.
DR   Gene3D; G3DSA:2.130.10.10; WD40/YVTN_repeat-like; 1.
DR   InterPro; IPR013923; Autophagy-rel_prot_16.
DR   InterPro; IPR020472; G-protein_beta_WD-40_rep.
DR   InterPro; IPR015943; WD40/YVTN_repeat-like_dom.
DR   InterPro; IPR001680; WD40_repeat.
DR   InterPro; IPR019775; WD40_repeat_CS.
DR   InterPro; IPR017986; WD40_repeat_dom.
DR   Pfam; PF08614; ATG16; 1.
DR   Pfam; PF00400; WD40; 4.
DR   PRINTS; PR00320; GPROTEINBRPT.
DR   SMART; SM00320; WD40; 7.
DR   SUPFAM; SSF50978; WD40_like; 1.
DR   PROSITE; PS00678; WD_REPEATS_1; 3.
DR   PROSITE; PS50082; WD_REPEATS_2; 4.
DR   PROSITE; PS50294; WD_REPEATS_REGION; 1.
PE   2: Evidence at transcript level;
KW   Alternative splicing; Autophagy; Coiled coil; Complete proteome;
KW   Cytoplasm; Polymorphism; Protein transport; Reference proteome;
KW   Repeat; Transport; WD repeat.
FT   CHAIN         1    619       Autophagy-related protein 16-2.
FT                                /FTId=PRO_0000337110.
FT   REPEAT      334    373       WD 1.
FT   REPEAT      378    417       WD 2.
FT   REPEAT      420    454       WD 3.
FT   REPEAT      455    498       WD 4.
FT   REPEAT      500    539       WD 5.
FT   REPEAT      546    585       WD 6.
FT   REPEAT      589    619       WD 7.
FT   COILED      116    227       Potential.
FT   VAR_SEQ       1    106       Missing (in isoform 2).
FT                                /FTId=VSP_033904.
FT   VAR_SEQ     276    619       Missing (in isoform 3).
FT                                /FTId=VSP_033905.
FT   VARIANT     220    220       R -> W (in dbSNP:rs11235604).
FT                                /FTId=VAR_043605.
FT   CONFLICT    124    124       E -> G (in Ref. 1; BAC03485).
FT   CONFLICT    256    256       A -> V (in Ref. 3; AAH36713).
FT   CONFLICT    343    343       R -> G (in Ref. 1; BAC03485).
FT   CONFLICT    492    492       G -> E (in Ref. 1; BAC04021).
FT   CONFLICT    508    508       L -> R (in Ref. 4; CAH56355).
SQ   SEQUENCE   619 AA;  68998 MW;  7F2962AA3C6BB850 CRC64;
     MAGPGVPGAP AARWKRHIVR QLRLRDRTQK ALFLELVPAY NHLLEKAELL DKFSKKLQPE
     PNSVTPTTHQ GPWEESELDS DQVPSLVALR VKWQEEEEGL RLVCGEMAYQ VVEKGAALGT
     LESELQQRQS RLAALEARVA QLREARAQQA QQVEEWRAQN AVQRAAYEAL RAHVGLREAA
     LRRLQEEARD LLERLVQRKA RAAAERNLRN ERRERAKQAR VSQELKKAAK RTVSISEGPD
     TLGDGMRERR ETLALAPEPE PLEKEACEKW KRPFRSASAT SLTLSHCVDV VKGLLDFKKR
     RGHSIGGAPE QRYQIIPVCV AARLPTRAQD VLDAHLSEVN AVRFGPNSSL LATGGADRLI
     HLWNVVGSRL EANQTLEGAG GSITSVDFDP SGYQVLAATY NQAAQLWKVG EAQSKETLSG
     HKDKVTAAKF KLTRHQAVTG SRDRTVKEWD LGRAYCSRTI NVLSYCNDVV CGDHIIISGH
     NDQKIRFWDS RGPHCTQVIP VQGRVTSLSL SHDQLHLLSC SRDNTLKVID LRVSNIRQVF
     RADGFKCGSD WTKAVFSPDR SYALAGSCDG ALYIWDVDTG KLESRLQGPH CAAVNAVAWC
     YSGSHMVSVD QGRKVVLWQ
//

For every record in the file, I want lines

AC   Q8NAA4; A5PL30; B2RPK5; Q658V4; Q6PID3; Q8NBG0;
FT   COILED      116    227       Potential.
FT   VARIANT     220    220       R -> W (in dbSNP:rs11235604) 

there may be one or more lines of FT COILED and FT VARIANT for a record. And every record ends with "//".

Thanks in advance

skrynesaver@busbox ~/$ egrep '^(AC|FT *(COILED|VARIANT))' tmp.dat
AC   Q8NAA4; A5PL30; B2RPK5; Q658V4; Q6PID3; Q8NBG0;
FT   COILED      116    227       Potential.
FT   VARIANT     220    220       R -> W (in dbSNP:rs11235604).

You should really be supplying some indication that you are trying to resolve these issues yourself.