    <SEC-DOCUMENT>0001564590-21-011781-index.html : 20210309
    <SEC-HEADER>0001564590-21-011781.hdr.sgml : 20210309
    <ACCEPTANCE-DATETIME>20210309164904
    ACCESSION NUMBER:		0001564590-21-011781
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		3
    CONFORMED PERIOD OF REPORT:	20210428
    FILED AS OF DATE:		20210309
    DATE AS OF CHANGE:		20210309

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			aTYR PHARMA INC
    		CENTRAL INDEX KEY:			0001339970
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		IRS NUMBER:				203435077
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-37378
    		FILM NUMBER:		21726598

    	BUSINESS ADDRESS:
    		STREET 1:		3545 JOHN HOPKINS COURT, STE #250
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92121
    		BUSINESS PHONE:		858-731-8389

    	MAIL ADDRESS:
    		STREET 1:		3545 JOHN HOPKINS COURT, STE #250
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92121
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>PRE 14A
    <SEQUENCE>1
    <FILENAME>life-pre14a_20210428.htm
    <DESCRIPTION>PRE 14A
    <TEXT>
    Document 1 - file: life-pre14a_20210428.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g5font11boa2000001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g5font11boa2000001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g5font11boa2000002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g5font11boa2000002.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>