Program to calculate amino acid composition for a protein sequence in matlab

For given problem it gives fasta file like sequences :>HMPREF9352_0001 rod shape-determining protein MreC [Streptococcus gallolyticus subsp. gallolyticus TX20005] MSLAFLFRNSGVVSAISSPIRSVVARVDSVVSAPFRFLDSANEEIRDLFNTYSENKELKQ KVAELEDQSELIDSLKEENEELNSEIGASSSITSQFSATGKVIVRSPVSWYDSLTVKLGK KNNITKKMLALSGGGLIGTVSDVDSTTSSITLLSNGSDFNIPIKITTSSAEVYGLLESYD SDKKCFVITNLNSSVDIEEGDSVVTSGLDGDTVANISVGTVSSVKNSSESLERVVYVTST ADFSDISYVTIVGD >HMPREF9352_0002 rod shape-determining protein MreD [Streptococcus gallolyticus subsp. gallolyticus TX20005] MIKVKFYKNKYFLLLLLFLLMLIDGQLSFLASSIFSYHLKVSSHLLLLAVLYFYHDKNKY FMFISSLVLGGIFDIYYLNRIGLVIFLLPILVIFTSKISKNFFVSNFQTLIFYIIVLFLF EIVGELGAILLGMTTMSMTYFIAYCFAPTLIYNILMYLIFQKVFKKVFLES >HMPREF9352_0003 CHAP domain protein [Streptococcus gallolyticus subsp. gallolyticus TX20005] MKKRILSAVLVSGVTLGTAAATVNADDYDTQIAAQDAVISNLTSEQAAAQSQVDALQEQV TSLQSQQDELEAQNAQLEAESQKLSEEIQALSSKIVARNESLKKQARSAQKTNTATSYIN TILNSKSISDAINRVAAVREVVSANEKMLEQQEADKAAIEQKQAENQEAINTVAANKATI EQNQAALATQQAELEAAQLNLSAQLATAEDEKASLVAQKEAAEQAAAEAAAAQAAAEAQA QAEAEAQAASVAQAQESVENGTATVDTTTDTSSQDSTTASTDTAAATEDTSSTQQAATVT PTATTTTSSSSSSSSASSSSSSSSSASTSSTASTSTSSSSSSSSSSSSVNTYPVGQCTWG VKSLASWVGNNWGNANQWIASAQAAGHSVGTTPQVGAVAVWPYDGGGYGHVAYVTAVQSS TSIQVMEANYAGNSSIGNYRGWFDPTSSTWGGGTVYYIYQ >HMPREF9352_0004 ribose-phosphate diphosphokinase [Streptococcus gallolyticus subsp. gallolyticus TX20005] MSYSDLKLFALSSNKELAEKVASAMGIELGKSTVRQFSDGEIQVNIEESIRGHHVFILQS TSSPVNDNLMEILIMVDALKRASAEKISVVIPYYGYARQDRKARSREPITSKLVANMLEV AGVDRLLTVDLHAAQIQGFFDIPVDHLMGAPLIADYFDRHGLVGDDVVVVSPDHGGVTRA RKLAQFLQTPIAIIDKRRSVTKMNTSEVMNIIGNVKGKKCILIDDMIDTAGTICHAADAL AEAGATAVYASCTHPVLSGPALENIEKSAIQKLVVLDTIYLSEERLIDKIEQISIAELIA EAITRIHEKRPLSPLFEMGTAK >HMPREF9352_0005 putative aromatic-amino-acid transaminase [Streptococcus gallolyticus subsp. gallolyticus TX20005] MSLTNRFNKNLDKIEVSLIRQFDQSISDVPGIMKLTLGEPDFTTPDHVKEAAKAAIDANQ SHYTGMAGLPALRQAAADFVKSKYNLSYNPDNEILVTIGATEALSATLTAILEPGDTVLL PAPAYPGYEPIANLVGAEIVEIDTTANDFVLTPEMLEKAILEQGDKLKAVLLNYPTNPTG VTYSREQIKALADVLKKYDIFVISDEVYSELTYNDEPHVSIAEYLPEQTILINGLSKSHA MTGWRIGLIFAPAIFTAQLIKSHQYLVTAAATMAQFAAIEALSAGKDDALPMKVEYIKRR DYIIDKMSALGFKIIKPDGAFYIFAKIPAGYEQDSFKFCQDFAREKAVAFIPGVAFGKYG EGYLRLSYAASMETITTAMERLKEFMEEHAN >HMPREF9352_0006 DNA repair protein RecO [Streptococcus gallolyticus subsp. gallolyticus TX20005] MQTKETYGLVLYNRNYREDDKLVKIFTETNGKHMFFVKHAGKSRFNSVIQPLTVAKFILK INDTGLSFIEDYKEVDSFKEINADLFKLSYASYVTALADAAVPDGVADPQLFAFVNKTLS LMEEGLDYEILTNIFEIQLLERFGVSLNFHECAFCHRVGLPFDFSHKYSGLLCPEHYGKD DYRSHLDPNVLYLVDRFQAIHFDELKTISVKPEMKRKLRLFIDDIYDNYVGLRLKSKKFI DDLGTWGNIMK

[Luuk van Oosten]

You can use

fastaread

to import these kind of files.

But what is your question exactly? because you already have the amino acid composition of all your proteins; it is in the file. Or do you want a list per protein where it says how many L or W or A residues it has?