                         SEQUENCE LISTING

<110>  Mersana Therapeutics, Inc.
 
<120>  NaPi2b-TARGETED POLYMER ANTIBODY-DRUG CONJUGATES AND METHODS OF 
       USE THEREOF

<130>  MRSN-026/001WO (322140-2347)

<150>  US 62/719,189
<151>  2018-08-17

<150>  US 62/733,380
<151>  2018-09-19

<150>  US 62/808,376
<151>  2019-02-21

<150>  US 62/854,701
<151>  2019-05-30

<160>  15    

<170>  PatentIn version 3.5

<210>  1
<211>  449
<212>  PRT
<213>  Homo sapiens

<400>  1

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Val Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Gly Tyr 
            20                  25                  30          


Asn Ile His Trp Val Lys Gln Ala Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Ala Ile Tyr Pro Gly Asn Gly Asp Thr Ser Tyr Lys Gln Lys Phe 
    50                  55                  60                  


Arg Gly Arg Ala Thr Leu Thr Ala Asp Thr Ser Thr Ser Thr Val Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Gly Glu Thr Ala Arg Ala Thr Phe Ala Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Ala Ser Thr Lys Gly Pro Ser Val 
        115                 120                 125             


Phe Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala 
    130                 135                 140                 


Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser 
145                 150                 155                 160 


Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val 
                165                 170                 175     


Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro 
            180                 185                 190         


Ser Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys 
        195                 200                 205             


Pro Ser Asn Thr Lys Val Asp Lys Arg Val Glu Pro Lys Ser Cys Asp 
    210                 215                 220                 


Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly 
225                 230                 235                 240 


Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile 
                245                 250                 255     


Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu 
            260                 265                 270         


Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His 
        275                 280                 285             


Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg 
    290                 295                 300                 


Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys 
305                 310                 315                 320 


Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu 
                325                 330                 335     


Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr 
            340                 345                 350         


Thr Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu 
        355                 360                 365             


Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp 
    370                 375                 380                 


Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val 
385                 390                 395                 400 


Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp 
                405                 410                 415     


Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His 
            420                 425                 430         


Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro 
        435                 440                 445             


Gly 
    


<210>  2
<211>  215
<212>  PRT
<213>  Homo sapiens

<400>  2

Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly 
1               5                   10                  15      


Asp Arg Val Thr Ile Thr Cys Ser Ala Ser Gln Asp Ile Gly Asn Phe 
            20                  25                  30          


Leu Asn Trp Tyr Gln Gln Lys Pro Gly Lys Thr Val Lys Val Leu Ile 
        35                  40                  45              


Tyr Tyr Thr Ser Ser Leu Tyr Ser Gly Val Pro Ser Arg Phe Ser Gly 
    50                  55                  60                  


Ser Gly Ser Gly Thr Asp Tyr Thr Leu Thr Ile Ser Ser Leu Gln Pro 
65                  70                  75                  80  


Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Lys Leu Pro Leu 
                85                  90                  95      


Thr Phe Gly Gln Gly Thr Lys Leu Glu Leu Lys Arg Arg Thr Val Ala 
            100                 105                 110         


Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser 
        115                 120                 125             


Gly Thr Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu 
    130                 135                 140                 


Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser 
145                 150                 155                 160 


Gln Glu Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu 
                165                 170                 175     


Ser Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val 
            180                 185                 190         


Tyr Ala Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys 
        195                 200                 205             


Ser Phe Asn Arg Gly Glu Cys 
    210                 215 


<210>  3
<211>  120
<212>  PRT
<213>  Homo sapiens

<400>  3

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Val Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Gly Tyr 
            20                  25                  30          


Asn Ile His Trp Val Lys Gln Ala Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Ala Ile Tyr Pro Gly Asn Gly Asp Thr Ser Tyr Lys Gln Lys Phe 
    50                  55                  60                  


Arg Gly Arg Ala Thr Leu Thr Ala Asp Thr Ser Thr Ser Thr Val Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Gly Glu Thr Ala Arg Ala Thr Phe Ala Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly 
        115                 120 


<210>  4
<211>  108
<212>  PRT
<213>  Homo sapiens

<400>  4

Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly 
1               5                   10                  15      


Asp Arg Val Thr Ile Thr Cys Ser Ala Ser Gln Asp Ile Gly Asn Phe 
            20                  25                  30          


Leu Asn Trp Tyr Gln Gln Lys Pro Gly Lys Thr Val Lys Val Leu Ile 
        35                  40                  45              


Tyr Tyr Thr Ser Ser Leu Tyr Ser Gly Val Pro Ser Arg Phe Ser Gly 
    50                  55                  60                  


Ser Gly Ser Gly Thr Asp Tyr Thr Leu Thr Ile Ser Ser Leu Gln Pro 
65                  70                  75                  80  


Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Lys Leu Pro Leu 
                85                  90                  95      


Thr Phe Gly Gln Gly Thr Lys Leu Glu Leu Lys Arg 
            100                 105             


<210>  5
<211>  10
<212>  PRT
<213>  Homo sapiens

<400>  5

Gly Tyr Thr Phe Thr Gly Tyr Asn Ile His 
1               5                   10  


<210>  6
<211>  17
<212>  PRT
<213>  Homo sapiens

<400>  6

Ala Ile Tyr Pro Gly Asn Gly Asp Thr Ser Tyr Lys Gln Lys Phe Arg 
1               5                   10                  15      


Gly 
    


<210>  7
<211>  10
<212>  PRT
<213>  Homo sapiens

<400>  7

Gly Glu Thr Ala Arg Ala Thr Phe Ala Tyr 
1               5                   10  


<210>  8
<211>  11
<212>  PRT
<213>  Homo sapiens

<400>  8

Ser Ala Ser Gln Asp Ile Gly Asn Phe Leu Asn 
1               5                   10      


<210>  9
<211>  7
<212>  PRT
<213>  Homo sapiens

<400>  9

Tyr Thr Ser Ser Leu Tyr Ser 
1               5           


<210>  10
<211>  9
<212>  PRT
<213>  Homo sapiens

<400>  10

Gln Gln Tyr Ser Lys Leu Pro Leu Thr 
1               5                   


<210>  11
<211>  329
<212>  PRT
<213>  Homo sapiens

<400>  11

Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys 
1               5                   10                  15      


Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr 
            20                  25                  30          


Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser 
        35                  40                  45              


Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser 
    50                  55                  60                  


Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr 
65                  70                  75                  80  


Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys 
                85                  90                  95      


Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys 
            100                 105                 110         


Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro 
        115                 120                 125             


Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys 
    130                 135                 140                 


Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp 
145                 150                 155                 160 


Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu 
                165                 170                 175     


Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu 
            180                 185                 190         


His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn 
        195                 200                 205             


Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly 
    210                 215                 220                 


Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu 
225                 230                 235                 240 


Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr 
                245                 250                 255     


Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn 
            260                 265                 270         


Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe 
        275                 280                 285             


Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn 
    290                 295                 300                 


Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr 
305                 310                 315                 320 


Gln Lys Ser Leu Ser Leu Ser Pro Gly 
                325                 


<210>  12
<211>  107
<212>  PRT
<213>  Homo sapiens

<400>  12

Arg Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu 
1               5                   10                  15      


Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu Asn Asn Phe 
            20                  25                  30          


Tyr Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln 
        35                  40                  45              


Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp Ser Lys Asp Ser 
    50                  55                  60                  


Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu 
65                  70                  75                  80  


Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln Gly Leu Ser Ser 
                85                  90                  95      


Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys 
            100                 105         


<210>  13
<211>  357
<212>  DNA
<213>  Homo sapiens

<400>  13
caagttcagc tggttcagtc tggcgccgag gttgtgaaac ctggcgcctc tgtgaagatg       60

agctgcaagg ccagcggcta caccttcacc ggctacaaca tccactgggt caagcaggcc      120

cctggacagg gactcgaatg gatcggagcc atctatcccg gcaacggcga caccagctac      180

aagcagaagt tccggggcag agccacactg accgccgata caagcaccag caccgtgtac      240

atggaactga gcagcctgag aagcgaggac agcgccgtgt actattgcgc cagaggcgaa      300

acagccagag ccacctttgc ctattggggc cagggaaccc tggtcaccgt tagctct         357


<210>  14
<211>  321
<212>  DNA
<213>  Homo sapiens

<400>  14
gatattcaga tgacacagag ccccagcagc ctgtctgcct ctgtgggaga cagagtgacc       60

atcacctgta gcgccagcca ggatatcggc aacttcctga actggtatca gcagaaaccc      120

ggcaagaccg tgaaggtgct gatctactac acctccagcc tgtacagcgg cgtgcccagc      180

agattttctg gcagcggctc tggcaccgac tacaccctga ccatatctag cctgcagcct      240

gaggacttcg ccacctacta ctgccagcag tacagcaagc tgcccctgac atttggccag      300

ggcaccaagc tggaactgaa g                                                321


<210>  15
<211>  690
<212>  PRT
<213>  Homo sapiens

<400>  15

Met Ala Pro Trp Pro Glu Leu Gly Asp Ala Gln Pro Asn Pro Asp Lys 
1               5                   10                  15      


Tyr Leu Glu Gly Ala Ala Gly Gln Gln Pro Thr Ala Pro Asp Lys Ser 
            20                  25                  30          


Lys Glu Thr Asn Lys Thr Asp Asn Thr Glu Ala Pro Val Thr Lys Ile 
        35                  40                  45              


Glu Leu Leu Pro Ser Tyr Ser Thr Ala Thr Leu Ile Asp Glu Pro Thr 
    50                  55                  60                  


Glu Val Asp Asp Pro Trp Asn Leu Pro Thr Leu Gln Asp Ser Gly Ile 
65                  70                  75                  80  


Lys Trp Ser Glu Arg Asp Thr Lys Gly Lys Ile Leu Cys Phe Phe Gln 
                85                  90                  95      


Gly Ile Gly Arg Leu Ile Leu Leu Leu Gly Phe Leu Tyr Phe Phe Val 
            100                 105                 110         


Cys Ser Leu Asp Ile Leu Ser Ser Ala Phe Gln Leu Val Gly Gly Lys 
        115                 120                 125             


Met Ala Gly Gln Phe Phe Ser Asn Ser Ser Ile Met Ser Asn Pro Leu 
    130                 135                 140                 


Leu Gly Leu Val Ile Gly Val Leu Val Thr Val Leu Val Gln Ser Ser 
145                 150                 155                 160 


Ser Thr Ser Thr Ser Ile Val Val Ser Met Val Ser Ser Ser Leu Leu 
                165                 170                 175     


Thr Val Arg Ala Ala Ile Pro Ile Ile Met Gly Ala Asn Ile Gly Thr 
            180                 185                 190         


Ser Ile Thr Asn Thr Ile Val Ala Leu Met Gln Val Gly Asp Arg Ser 
        195                 200                 205             


Glu Phe Arg Arg Ala Phe Ala Gly Ala Thr Val His Asp Phe Phe Asn 
    210                 215                 220                 


Trp Leu Ser Val Leu Val Leu Leu Pro Val Glu Val Ala Thr His Tyr 
225                 230                 235                 240 


Leu Glu Ile Ile Thr Gln Leu Ile Val Glu Ser Phe His Phe Lys Asn 
                245                 250                 255     


Gly Glu Asp Ala Pro Asp Leu Leu Lys Val Ile Thr Lys Pro Phe Thr 
            260                 265                 270         


Lys Leu Ile Val Gln Leu Asp Lys Lys Val Ile Ser Gln Ile Ala Met 
        275                 280                 285             


Asn Asp Glu Lys Ala Lys Asn Lys Ser Leu Val Lys Ile Trp Cys Lys 
    290                 295                 300                 


Thr Phe Thr Asn Lys Thr Gln Ile Asn Val Thr Val Pro Ser Thr Ala 
305                 310                 315                 320 


Asn Cys Thr Ser Pro Ser Leu Cys Trp Thr Asp Gly Ile Gln Asn Trp 
                325                 330                 335     


Thr Met Lys Asn Val Thr Tyr Lys Glu Asn Ile Ala Lys Cys Gln His 
            340                 345                 350         


Ile Phe Val Asn Phe His Leu Pro Asp Leu Ala Val Gly Thr Ile Leu 
        355                 360                 365             


Leu Ile Leu Ser Leu Leu Val Leu Cys Gly Cys Leu Ile Met Ile Val 
    370                 375                 380                 


Lys Ile Leu Gly Ser Val Leu Lys Gly Gln Val Ala Thr Val Ile Lys 
385                 390                 395                 400 


Lys Thr Ile Asn Thr Asp Phe Pro Phe Pro Phe Ala Trp Leu Thr Gly 
                405                 410                 415     


Tyr Leu Ala Ile Leu Val Gly Ala Gly Met Thr Phe Ile Val Gln Ser 
            420                 425                 430         


Ser Ser Val Phe Thr Ser Ala Leu Thr Pro Leu Ile Gly Ile Gly Val 
        435                 440                 445             


Ile Thr Ile Glu Arg Ala Tyr Pro Leu Thr Leu Gly Ser Asn Ile Gly 
    450                 455                 460                 


Thr Thr Thr Thr Ala Ile Leu Ala Ala Leu Ala Ser Pro Gly Asn Ala 
465                 470                 475                 480 


Leu Arg Ser Ser Leu Gln Ile Ala Leu Cys His Phe Phe Phe Asn Ile 
                485                 490                 495     


Ser Gly Ile Leu Leu Trp Tyr Pro Ile Pro Phe Thr Arg Leu Pro Ile 
            500                 505                 510         


Arg Met Ala Lys Gly Leu Gly Asn Ile Ser Ala Lys Tyr Arg Trp Phe 
        515                 520                 525             


Ala Val Phe Tyr Leu Ile Ile Phe Phe Phe Leu Ile Pro Leu Thr Val 
    530                 535                 540                 


Phe Gly Leu Ser Leu Ala Gly Trp Arg Val Leu Val Gly Val Gly Val 
545                 550                 555                 560 


Pro Val Val Phe Ile Ile Ile Leu Val Leu Cys Leu Arg Leu Leu Gln 
                565                 570                 575     


Ser Arg Cys Pro Arg Val Leu Pro Lys Lys Leu Gln Asn Trp Asn Phe 
            580                 585                 590         


Leu Pro Leu Trp Met Arg Ser Leu Lys Pro Trp Asp Ala Val Val Ser 
        595                 600                 605             


Lys Phe Thr Gly Cys Phe Gln Met Arg Cys Cys Cys Cys Cys Arg Val 
    610                 615                 620                 


Cys Cys Arg Ala Cys Cys Leu Leu Cys Asp Cys Pro Lys Cys Cys Arg 
625                 630                 635                 640 


Cys Ser Lys Cys Cys Glu Asp Leu Glu Glu Ala Gln Glu Gly Gln Asp 
                645                 650                 655     


Val Pro Val Lys Ala Pro Glu Thr Phe Asp Asn Ile Thr Ile Ser Arg 
            660                 665                 670         


Glu Ala Gln Gly Glu Val Pro Ala Ser Asp Ser Lys Thr Glu Cys Thr 
        675                 680                 685             


Ala Leu 
    690 


