Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4622
Number of amino acids:769
Molecular Weight:85704.02 Da
Theoretical pI:5.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)334.29%
Cysteine CYS (C)303.9%
Glutamic Acid GLU (E)486.24%
Aspartic Acid ASP (D)425.46%
Glycine GLY (G)587.54%
Phynylalanine PHE (F)303.9%
Isoleucine ILE (I)567.28%
Histidine HIS (H)121.56%
Lysine LYS (K)364.68%
Methionine MET (M)141.82%
Leucine LEU (L)628.06%
Asparagine ASN (N)465.98%
Glutamine GLN (Q)182.34%
Proline PRO (P)222.86%
Serine SER (S)759.75%
Arginine ARG (R)425.46%
Threonine THR (T)526.76%
Tryptophan TRP (W)40.52%
Valine VAL (V)516.63%
Tyrosine TYR (Y)384.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3759
HydrogenH5905
NitrogenN1023
OxygenO1179
SulphurS44

FormulaC3759H5905N1023O1179S44
Total Number of Atoms:11910


Total number of positively charged residues (ARG + LYS):78
Total number of negatively charged residues (ASP + GLU):90
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    80495
Absorption 0.1% (=1 g/l)    0.939,   assuming all pairs of CYS residues form cystines

Ext. coefficient    78620
Absorption 0.1% (=1 g/l)    0.917,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.34, 26.14, 20.42]

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:83.368
Grand average of hydropathicity (GRAVY):-0.22