Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5426
Number of amino acids:327
Molecular Weight:36741.19 Da
Theoretical pI:7.25


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)216.42%
Cysteine CYS (C)103.06%
Glutamic Acid GLU (E)195.81%
Aspartic Acid ASP (D)206.12%
Glycine GLY (G)185.5%
Phynylalanine PHE (F)123.67%
Isoleucine ILE (I)185.5%
Histidine HIS (H)92.75%
Lysine LYS (K)206.12%
Methionine MET (M)92.75%
Leucine LEU (L)3310.09%
Asparagine ASN (N)185.5%
Glutamine GLN (Q)61.83%
Proline PRO (P)164.89%
Serine SER (S)247.34%
Arginine ARG (R)195.81%
Threonine THR (T)164.89%
Tryptophan TRP (W)10.31%
Valine VAL (V)247.34%
Tyrosine TYR (Y)144.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1626
HydrogenH2577
NitrogenN447
OxygenO484
SulphurS19

FormulaC1626H2577N447O484S19
Total Number of Atoms:5153


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26985
Absorption 0.1% (=1 g/l)    0.734,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26360
Absorption 0.1% (=1 g/l)    0.717,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.55

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.19, 23.24, 25.08]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:88.532
Grand average of hydropathicity (GRAVY):-0.23